Check Engine Light Common Causes

It just indicates that something is wrong with the engine. If that dreaded check engine light comes on, the first thing you should check for is a loose or faulty gas cap. What Does The Check Engine Light Mean When Illuminated?. If your Check Engine Light has come on, there are a number of conditions that could be causing it. A loose gas gap? A more serious engine malfunction? There’s only one way to find out — take the vehicle to a service and repair shop. It is the light that we shouldn’t ignore. Why these codes? Well, these are the most common codes. While we understand not everyone is a mechanic, understanding why your Toyota check engine light is on can relieve a lot of stress. This car runs great, and in fact the emissions part of the smog test was normal, no problems at all. When the car is cold, Check the coolant level. Check engine lights go on when there is a problem in the engine or the emissions control system. A shorted battery will cause your check engine light to come on as well as the ignition start light, and you won't be able to jump start the car. If the "check engine" light is on, check the vehicle's onboard computer system using the prescribed procedure for a "trouble code" that would correspond to a bad knock sensor (code 42 or 43 for GM, code 25 for. If you fill up your BMW but forget to tighten the gas cap the system will detect the fault and turn on the light. CarComplaints. ) We'll figure out why your Nissan check engine light is on, at no extra charge. Blue exhaust smoke along with the service engine soon light may indicate a fuel system fault caused by an engine oil leak. In most modern cars, the check engine light can be caused by not having the gas cap screwed on tight enough or having a worn out gas cap. A MIL "Check Engine" light on a Volkswagen Bora indicating a fault in the Engine Management System. It also has a pretty intimate relationship with the engine, so trouble for one can mean trouble for both. So you see that infamous glow on your instrument cluster in your BMW, yep, it's your check engine light, and it's on. Average repair cost is $60 at 47,000 miles. So here's a look at the 10 most common reasons for the engine light to turn on and what it might cost you to turn it off, according to CarMD's analysis of 160,000 repairs last year. The problem: Cars have lots of sensors to check if everything's running smoothly. I have a 1999 Cavalier and lately, I have an intermittent hesitation and misfiring and the check engine light will come on in the dash. Code P0300: Random/Multiple Cylinder Misfire Detected. My 2004 Ford Ranger started idling rough and the check engine light came on. This time the dealer found that there was no compression in three cylinders do to the valves not seating properly. The most likely cause is a damaged primary timing chain tensioner. The Check Engine Light (CEL) is one of the most commonly illuminated indicator lights on any given vehicle. engine codes. If the problem is a reoccurring issue, then a professional diagnostic must be done. Why is Your Volkswagen Check Engine Light On? Regular vehicle maintenance is an important aspect of owning a new Volkswagen and can significantly extend the life of your 2016 Volkswagen Passat. But when it is on it runs like crap, and when its off, it runs fine. Read on to discover some of the most common causes behind a check engine warning! Common Reasons For A Check Engine Warning. com The Check Engine light or Service Engine soon light is one of the most misunderstood warning lights on a vehicle dashboard. My 2004 Ford Ranger started idling rough and the check engine light came on. The cause of your check engine light signal turning on can be the result of many different issues. It does not exhibit any drivability problem and you would not know it was not functional unless a ECM reported it. Modern cars have a lot more electronics, which means, many other things could go wrong too. If the check engine light flickers on in your 2016 Toyota RAV4, be sure to check the condition of spark plugs and spark plug wires. The 2014 Chevrolet Cruze has 15 problems reported for check engine light. So you see that infamous glow on your instrument cluster in your BMW, yep, it's your check engine light, and it's on. The light stayed on for a couple of days but never had a problem. Leaving the cap loose will cause fuel vapors to leak and that leads to poor fuel economy. It is this generic function of the “check engine” light that can frustrate drivers when it lights up. It's important to make sure the gas cap is tightly closed every time you fill up your vehicle with gas. This article applies to the Jeep Grand Cherokee WJ (1999-2004). The check engine light has been going on and off. As with anything, turbo engine failure gets worse the longer it remains unchecked. I'll give you the answer which goes out for all vehicles. thanks Update: My corolla is 2001 I had the codes run the other day. • Faulty oxygen sensor. You are here: Check Engine Light Home > Check Engine Light Codes (Generic Powertrain) Check Engine Light Codes. 6 liter diesel engine, ready to battle the new Power Stroke and Cummins, only on dieselpowermag. The 2014 Chevrolet Cruze has 15 problems reported for check engine light. So here is a free tip: if the check engine light comes on shortly after. There's a world of difference between the two. In the meanwhile, here are five common causes of the check engine light (and what to do about it). Common causes of a check engine light. If engine noise occurs, it could signal an internal engine defect or failure. Causes for failing an OBD test: The vehicle's on-board diagnostic system reports a failure or problem with an emissions related component or sensor. Gear box Check engine light When accelerating through gears sometimes if not fully accelerated and change gear it struggles for only a second or two and the engine light flashes and then goes off. Most common reasons for a check engine light in Acura When you first start up your engine, your dashboard warning lights will trigger for a second, then switch off. It also has a pretty intimate relationship with the engine, so trouble for one can mean trouble for both. A loose gas cap can trigger your Check Engine light. Subaru Check Engine Light. My check engine light is on when the engine is running. Get the truck check by a pro to see why the light is on. This page will list all the Check Engine Light questions and answers asked of us pertaining to Dodge vehicles including the Ram, Dakota, Caliber, Neon, and others. The constant yellow light is a true warning light. Some problems are common fixes, while other causes may be more difficult and severe for your vehicle. Your gas cap clicks for a reason, and that reason is to let you know that you have tightened correctly. But it could be lots of things. A flashing chek engine light is very bad, and the car shouldnt be driven untill the cause of it is discovered. These diagnostic scanners are a must for all car owners. What Problems Can Trigger the Check Engine Light? Ranging from minor to major, a slew of things can trigger the check engine light to come on in your Mercedes-Benz, including (but not limited to): Loose gas cap; Faulty fuel injector. What is code 32 for this vehicle and what is the best guess of the problem as the van runs well with no apparent change since light came on. We list common check engine light codes for you on this page at the bottom. Usually you will be able to feel a noticeable difference in the way your vehicle is running. When the check engine light comes on, the computer will set codes in its memory that will help a technician diagnose the problem. car repair costs, and the list of. Common issues, tips and tricks for the 2. Computer monitors system for values outside of suggested levels. We've briefly touched on what your dashboard warning lights means, but there's one light in particular that can cause the most frustration: the check engine light. If it's an LS1 a very common problem is the oil pressure switch, there are some good posts on here showing location, try search. Although an issue with the gas cap or spark plugs may be the simple cause of a check engine light coming on, always have a professional diagnostic run by an Audi mechanic. However, not all check engine light codes are that simple and some require immediate attention. The Engine check light comes on constantly. Top 10 Reasons Why Your Check Engine Light Turns On Many people probably just ignore the check engine light when it comes on, but it can be triggered by a number of issues. In rare case the engine can overheat. most common causes - gas cap & oxygen sensor. The check engine light is an irritation for many drivers, but it gives you essential information about your car and shouldn't be ignored. It is the most misunderstood indicator on your dashboard, the "check engine" light can mean many different things, from a loose gas cap to a seriously malfunctioning engine loosing power. In some cases, no abnormal symptoms will be experienced. The signal is not constant and within parameters with the ignition key turned off. The most recently reported issues are listed below. The indicator is triggered when your Kia's on-board computer (ECU - Electronic Control Unit) finds something out of the normal with its usual function. What if a Warning Light is RED? A RED indicator light means the problem is immediate and severe. If the ECU doesn't see the proper changes in the exhaust, eventually it will set the Check Engine Light with a code of P0420. When the Service Engine Soon or. You are here: Check Engine Light Home > Dodge Check Engine Light Questions & Answers Dodge Questions & Answers. Within seconds you will be able to find out why the check engine light is on. This article applies to the Jeep Grand Cherokee WJ (1999-2004). Some vehicles may experience Check Engine Light illumination with a trouble code indicating the thermostat is stuck open. Engine cranks but will not start. Battery Light. A check on the coolant overflow reservoir will determine if the coolant is leaking. Frothy oil results in a loss of vital oil pressure and can result in serious engine damage. Most Common Causes of a Check Engine Light and What You Can Do Check engine lights have a way of sticking in every owner’s mind. The flashing light can mean misfire, the cam and crank sensors being out of synch (worn timing belt) to name a few things. Pull over, turn off the ignition and determine the cause or call a tow vehicle. Common Causes of ABS Light Comes. Modern cars have a lot more electronics, which means, many other things could go wrong too. Most Common Causes for the Check Engine Light to Come on Faulty Oxygen Sensor. These are just a few of the hundreds of causes and symptoms that would result in an engaged check engine light. It is important to save time and money by identifying the exact issue and have the appropriate repairs done by someone with experience. Sometimes, it stops working due to overheating and causes the check engine light to turn on. Is this normal after the 10,000 mile range? Like maybe a service warning or something more is going on and will cause a failure down the road?. It's not really a big deal and it won't do anything to your vehicle if you run it and don't get it fixed. This isn't the only reason though, the code or DTC P1456 is caused by a leak on the tank side of the evaporative system, and the most common cause is a loose or missing gas cap, but it could also mean a leak in the fuel tank, or one of the tubes or hoses. " There can be a lot of things that can cause your check engine light to come on, but there are a few that are more common than others. Then it may or may not be illuminated when I re-start the car. Common Causes of a flashing or blinking check engine light The check engine light is most likely to blink if it's a severe constant problem, like an occurring ignition misfire, injector or a temperature sensor problem, that have an essential part of the engines running. Te SES flashes because the misfire is bad enough to cause possible catalytic converter damage. In rare case the engine can overheat. Step 1 - Once a check engine or service engine soon light has determined a lean engine code has materialized, a repair procedure inspection is needed. What do I do? ATS Advisor: There is common cause for this problem and it is attributed to the poor location of the ecm. Below you will find the most complete list of Nissan trouble codes available. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there?. As with anything, turbo engine failure gets worse the longer it remains unchecked. It’s a common rule that cars should run smoothly on a flat road, at any speed. The generic trouble code P2509 power input signal intermittent refers to an engine with an intermittent electrical signal to the Electronic Control Module (ECM) otherwise also known as a PCM or Powertrain Control Module. If your check engine light is on or flashing, it’s important to have it checked immediately, both for your peace of mind, and to help avoid costlier repairs down the road. Check engine light comes on when gas cap is loose or completely missing, spark plugs or plug wires are damaged, vehicle has a bad catalytic converter, oxygen sensor needs to be replaced. If your check engine light comes on, your problem is probably not an emergency, but you should still get your car checked out by a reputable mechanic in Little Rock. It could be a misfiring engine, a broken oxygen sensor or simply a loose gas cap. The Most Common Trouble Codes That Can Cause Your Check Engine Light To Come On by automedicsnig: 7:26am On Sep 20, 2014 www. An ASE certified mechanic can retrieve the trouble codes from within the onboard electronic control module and determine the specific cause. Luckily, finding the cause of a check engine light is a pretty straightforward affair, and resetting is even easier. Don't let a little problem turn into a big one, have it diagnosed quickly. So you see that infamous glow on your instrument cluster in your BMW, yep, it’s your check engine light, and it’s on. A federal government mandated on-board diagnostics (OBD) for all passenger cars sold in the United States, a check engine light is different than "service required" light which simply means it's time for an oil change or air filter check. There are some straightforward checks that you can do on the side of the road yourself and in many cases solve the problem. What if the Light Stays On? If the light stays on, you need to have the problem diagnosed and fixed or you may damage expensive engine or exhaust components. The flashing light can mean misfire, the cam and crank sensors being out of synch (worn timing belt) to name a few things. 1 day ago · Question: I just had a check-engine light happen. Pull over, turn off the ignition and determine the cause or call a tow vehicle. Unfortunately, there are litterally 100's of parts and sensors monitored in various systems, and to take a "guess" as to which part/sensor in which system is faulty, is virtually impossible. Remember, systems work together and the other systems could be affecting how your transmission operates. The most common reason for an overheating engine is low coolant level. A loose gas cap can trigger your Check Engine light. Things that CAN contribute to a yellow check engine light are: Emission sensors that have failed. Then it may or may not be illuminated when I re-start the car. This light doesn't specify the nature of the problem. Even a tiny crack in a vacuum hose can cause the light to come on. P0574 Bentley Turbo diagnostic code look-up and symptoms,reasons and P0574 code for Bentley Turbo engine trouble check. com The Check Engine light or Service Engine soon light is one of the most misunderstood warning lights on a vehicle dashboard. However, if I scanned it, my scanner will not communicate with the engine computer (ecm). While being one of the most common codes, it can also be one of the most inaccurate. A common element in your vehicle, bad spark plugs or spark plug wires are one of our top 5 reasons why your check engine light is on. Some of these problems are minor, but some are more serious. You have gone through multiple 'check engine' light episodes, have replaced multiple oxygen sensors, and are on your third or fourth catalytic converter. Check engine lights go on when there is a problem in the engine or the emissions control system. Perhaps your catalytic converter is failing, or "poisoned" from chemicals that were not supposed to be in the exhaust. And it is scary to drive on the road. Common causes of a check engine light. It just indicates that something is wrong with the engine. The check engine, or service engine soon, light can illuminate for various reasons—some are immediate concerns, but most are emissions related and will not affect performance or cause damage. The stock ignition system starts to get corroded and isn't able to create the necessary spark leading to the misfires. com : Car complaints, car problems and defect information. Why is the check engine light on in my Hyundai? By Product Expert | Posted in Tips & Tricks on Wednesday, August 16th, 2017 at 6:31 pm. This light doesn't specify the nature of the problem. Therefore there is no known cause for the CEL (check engine light) and Trac Off. The Check Engine Light (CEL) is one of the most commonly illuminated indicator lights on any given vehicle. I have a 1999 Cavalier and lately, I have an intermittent hesitation and misfiring and the check engine light will come on in the dash. FIXD explains symptoms, causes, and severity of P0442. 0t FSI BPY engine. I did have the fuel pump fail and replaced that and the seals to the new Green ones a few years ago. If the gas cap and engine oil level are fine, the check engine light could mean a more serious problem, such as: Damaged spark plugs, wires, or coils. Gross fuel trim failure. A loose gas cap could be the problem. A check engine light can indicate a broad spectrum of problems with your 2002 Ford Thunderbird. But what you could do is to check the most common causes of a service engine soon light. engine codes. com The Check Engine light or Service Engine soon light is one of the most misunderstood warning lights on a vehicle dashboard. Offering up remote armchair diagnosis of the check-engine light isn't all that simple, as there are any variety of factors, or combination thereof, that can trigger the CEL, but it's possible somebody around here has seen a similar problem to yours and will have worked through it. We do offer a fault code reader and reset tool that you can use to check the codes. Low oil pressure is a common cause of a check engine light turning on, and it can seriously interfere with your car’s performance. Most common reasons for a check engine light At the core of it, one of the many systems managed connected to your engine or exhaust is failing, and when the computer senses this, it triggers a light. These are all easily fixed problems. The Causes of Internal Engine Knock, and How to Eliminate it. Eventually it became a hard start also. This article applies to the Jeep Grand Cherokee WJ (1999-2004). The 2014 Chevrolet Cruze has 15 problems reported for check engine light. One thing that can really throw us for a loop is when the check engine light comes on in our vehicles. The check engine light is a sure sign that something is amiss with your Audi. A loose gas cap is one of the most common reasons why the check engine light turns Catalytic converter failure. Nissan Check Engine Light Codes. What are the common problems that can cause the Check Engine light? In older cars, it was typically something like a bad oxygen sensor , worn-out spark plugs or ignition wires. Check your gas cap. Usually, if this is the case, your oil light will also appear. What if the Light Stays On? If the light stays on, you need to have the problem diagnosed and fixed or you may damage expensive engine or exhaust components. Can someone help, i hope to fix it soon. Does anybody know any likely causes of the check engine light? I've switched back to the custom tune after the check engine light came on before which I assumed was because of the cat. The important part to look for with this answer, is the engine type ZJ, Z6, and LF. Among the many causes of a dash-light. But when it is on it runs like crap, and when its off, it runs fine. According to a study conducted by CarMD, five common malfunctions cause the check engine light to come on, and several of them are simple to fix yourself. Check Engine Light. The flashing light can mean misfire, the cam and crank sensors being out of synch (worn timing belt) to name a few things. My check engine light is on I have a 2011 4x4 1500 Silverado (ext cab), with 31k miles. In that case, cooling down the engine for some time will cool off. A MIL "Check Engine" light on a Volkswagen Bora indicating a fault in the Engine Management System. The check engine, or service engine soon, light can illuminate for various reasons—some are immediate concerns, but most are emissions related and will not affect performance or cause damage. An engine should not overheat if the cooling system is properly filled and is working normally -- even during hot weather or stop-and-go driving. We went to a lot of places to fix it but still it comes back. If your Check Engine Light has come on, there are a number of conditions that could be causing it. Replace Catalytic Converter (s) with new OE Catalytic Converter (s). Let's take a look at the most common issues. Subaru Check Engine Light. The list is in descending order of popularity. Check engine light comes on when gas cap is loose or completely missing, spark plugs or plug wires are damaged, vehicle has a bad catalytic converter, oxygen sensor needs to be replaced. Why is the check engine light on in my Hyundai? By Product Expert | Posted in Tips & Tricks on Wednesday, August 16th, 2017 at 6:31 pm. See here for a step-by-step guide on how to diagnose and fix check engine light code P0456. I'd probably check all your grounds and make sure they're clean and tight before replacing though. Malfunctioning oxygen sensor. In other words they will only start replace things under warranty if you are consuming more than 1qt of oil per 1000 miles. A number of things can cause the check engine light to turn on. 0L is could be having that is making your check engine list appear such as bad EGR Valve to an Exhaust Backpressure Sensor or a Vane is stuck open. If the problem is less serious, you may not notice any symptoms at all except the check engine light on. You are here: Check Engine Light Home > Check Engine Light Codes (Generic Powertrain) Check Engine Light Codes. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". If you ignore a flashing check engine light it is entirely possible that the vehicle burns up the catalyst and causes engine damage. Check Your Gas Cap. Here's what you need to know about the common causes of an illuminated engine indicator and the steps you should take next. What if the Light Stays On? If the light stays on, you need to have the problem diagnosed and fixed or you may damage expensive engine or exhaust components. What are the causes of that light and any other information on running the vehicle with the light on. 6; about 160,000 miles; always regularly serviced at Porsche dealership prior to my ownership, with records at the dealership. Engine cranks but will not start. The battery warning light illuminates to indicate poor battery condition. My 2004 Ford Ranger started idling rough and the check engine light came on. Let's take a look at the most common issues. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. When this happens, it causes your vehicle to fail the self-diagnostic evaporative emissions test it runs, triggering the check engine light to turn on. The wheel speed sensors are located inside the center of the wheel and in some cases, inside the transmission. Although an issue with the gas cap or spark plugs may be the simple cause of a check engine light coming on, always have a professional diagnostic run by an Audi mechanic. It could also be a warning of a serious problem that could damage your engine components. My check engine light does not come on when I turn the key on. Nissan Check Engine Light Codes. Replace Ignition Coil (s) and Spark Plug (s). (Hear me out, there's a context here!) With previous vehicles, i've found that it can be something as subtle as the air filter needing changing. What does it mean when your check engine light comes on? It could be a problem as small as a gas cap that isn't totally tightened. Check engine light just came on 3 Answers. Common Symptoms. Check out these four common check engine light issues! 1. Some of these problems are minor, but some are more serious. Is it a serious problem or not? If the engine seems to be running okay, the motorist may simply ignore the light. The Gas Cap Code and DIY Check Engine Light Car Repair The gas cap code is a common diagnostic trouble code that might turn your check engine light on. It also has a pretty intimate relationship with the engine, so trouble for one can mean trouble for both. Does anybody know any likely causes of the check engine light? I've switched back to the custom tune after the check engine light came on before which I assumed was because of the cat. Remember that although it could be something simple, it's always worth making sure and you may have to visit your local dealer or repair shop. Honda: How to Reset the Check Engine Light. That little yellow outline can be the bane of any driving experience, as you can't tell immediately whether something is. Whether it’s faulty, or just really dirty, it can send out an incorrect reading and trigger your sensor. According to a study conducted by CarMD, five common malfunctions cause the check engine light to come on, and several of them are simple to fix yourself. Please don't read that as an excuse to procrastinate! Driving in spite of a check engine light for days or weeks (or months) could cause serious damage. Usually, if this is the case, your oil light will also appear. Don't let a little problem turn into a big one, have it diagnosed quickly. I was wondering what are some common problems that could make the check engine light come on. Old spark plugs will cause your Mitsubishi check engine light to come on with fault codes P0300, P0301, P0302, P0303, P0304. Although an issue with the gas cap or spark plugs may be the simple cause of a check engine light coming on, always have a professional diagnostic run by an Audi mechanic. The service engine light could also occur in different colors and you should be aware of the colors. When you see the check engine light illuminated in your dash, it means your Mercedes-Benz has detected a problem within its OBD system. Battery Light. A check engine light can also be caused by a vacuum leak from one of the hoses that run throughout the engine of a Buick Century. I put together a video discussing a problem my neighbor had with Nissan Maxima four door sedan after they filled the fuel tank. Replace Ignition Coil (s) and Spark Plug (s). The most common Subaru check engine light is the old "forgot to tighten the gas cap" signal. However, the “check engine” light can also be triggered by a number of minor issues. My fuel pump is real noisy. When your check-engine light appears, don't ignore it. This light doesn't specify the nature of the problem. Then it may or may not be illuminated when I re-start the car. In late model Subaru's, when the check engine light is illuminated, your Subaru may turn on other warning lights (cruise control, VDC, Hill Holder, X-Mode, etc). This list only consists of the most common explanations. I ask because mine came on, but my engine sounds and feels perfectly fine. One of the most common reasons the engine light comes on, is due to a loose gas cap. The Gas Cap Code and DIY Check Engine Light Car Repair The gas cap code is a common diagnostic trouble code that might turn your check engine light on. In most cases when the check engine light comes on, it will be a constant yellow light. What are the most common check engine light (CEL) or DTC codes. The transmissions above are rear wheel drive 4 speed automatics that are all computer controlled. A MIL "Check Engine" light on a Volkswagen Bora indicating a fault in the Engine Management System. Keep reading to check out the top five reasons your check engine light may be on. See here for a step-by-step guide on how to diagnose and fix check engine light code P0442. FIXD explains symptoms, causes, and severity of P0442. My son checked it with his little tool and phone and said its a P0440 code. You are here: Check Engine Light Home > Dodge Check Engine Light Questions & Answers Dodge Questions & Answers. Mine runs down to the engine block, and then a smaller wire is part of it too, but it goes to the front of the truck. Perhaps your catalytic converter is failing, or "poisoned" from chemicals that were not supposed to be in the exhaust. The Oxygen Sensor measures the amount of oxygen in your exhaust system. Sometimes, this warning means you're going to need a major repair. 2003 toyota seuoia. It has been acting up for the past 2 months. Your gas cap seals the fuel system and maintains system pressure and leaking fuel vapors can cause the whole system to go haywire. There are a whole list of problems your 6. Sometimes, it stops working due to overheating and causes the check engine light to turn on. My check engine light is flashing fast all the time. Replace Ignition Coil (s) and Spark Plug (s). It's up to you to find the cause of the mixture issue. What if a Warning Light is RED? A RED indicator light means the problem is immediate and severe. The check engine light is part of a system that constantly monitors diagnostics relating to emissions, engine efficiency and fuel efficiency, among other things. In some ways the check engine light is the most obvious one to diagnose, as far as which part it's pointing to as a problem. In simple terms, it means that more pollution is added into the air than what was supposed to be because of your car. Is safe to drive your vehicle home or to a service shop, visit auto service as soon as possible. engine codes. Gross fuel trim failure. The CHECK ENGINE light (or SERVICE ENGINE SOON) will only come on when the engine management system has recorded a fault. So here's a look at the 10 most common reasons for the engine light to turn on and what it might cost you to turn it off, according to CarMD's analysis of 160,000 repairs last year. Gas cap issue can turn on check engine light. which can cost up to 500. If you have an MOT scheduled and the engine management light is on, then there’s a possibility your car could fail the MOT if it’s related to the checks undertaken during the MOT process. Fuel System: If fuel is missing from any one specific engine cylinder, it will misfire. The often misunderstood check engine light or "service engine soon" message can mean many different things. Whether it’s faulty, or just really dirty, it can send out an incorrect reading and trigger your sensor. You have gone through multiple 'check engine' light episodes, have replaced multiple oxygen sensors, and are on your third or fourth catalytic converter. ENGINE NOISE: May be related to Check Engine Light. Most Check engine lights are errors. A loose radiator cap can also trigger the check engine light. Among the many causes of a dash-light. Most common cause of sludge problem. It then communicates this information to your car's computer so that it can adjust the engine's air and fuel mixture. If you find your cap isn't screwed all the way on, tighten it completely. I've had two friends who drove a few miles with this light on and burned up their engines. You should always have the codes generated by your car's computer scanned and read so you can determine the cause. " When the check engine light is. When the engine light is flashing it means you are doing harm to the catalictic convertors which are very expense for those truck and have a chance of plugging up and cause your truck to run like a bag of crap. When there is too much fuel or too much oxygen going into the engine, the use of this sensor can allow your car's computer to equalize the issue. This engine component measures the amount of unburned oxygen in your exhaust system. If you're like us, doesn't it sometimes feel that when you see your Chrysler's check engine light come on it feels like the world stopped turning?. Consider the following signs and causes of failure if you're looking to get the most out of your. FIXD explains symptoms, causes, and severity of P0442. Common Reasons the Check Engine Light Comes On and What to Do Published on February 5, 2015 November 11, 2015 by [email protected]