It has 81k miles and its super clean. Below is a list of the top 10 reasons why your Chevy check engine light may come on. The trouble codes you may find are P0300 P0351 – P0358 P2300, P2301, P2303, P2304, P2306, P2307, P2309, … … Can you tell me what this problem can … the trucks computer is smart and the code will tell you witch one is bad but if you replace just one the next one on the same exhaust pipe will probley go bad so its safe to replace all four. Answer: This usually happens when raw (unburned) fuel makes its way into the catalytic converter. Part of what makes the "check engine" light (CEL) so maddening is that it doesn't tell you exactly what's wrong with your pickup. Whatever the cause, failure to get your Chevy vehicle checked out when the check engine light goes on could lead to further damage meaning costlier and more invasive repairs. you have to know what the code is that your truck putting out your truck has 4 O2 sensors. I have replaced fuel cap and fuel filter recently. Question: My check engine is flashing on my 2009 Chevy Silverado. KMWHITE2122 MEMBER; 2003 CHEVROLET SILVERADO; V8; 4WD; AUTOMATIC; 76,000 MILES; The engine light is on and the code reader is giving me codes PO171 Bank 1 and PO174 Bank 2 running lean. If the engine oil is so low that the oil pressure will get low, it can cause a bad timing chain timing, which may cause misfires. If you are unsure about what your diagnostic trouble codes mean; have your Silverado 1500 diagnosed by a professional … How to diagnose engine ignition misfires. And lets face it, if the service engine light is … My truck has 88,000 miles on it and gm refuses to fix it even though there are service bulletins pertaining to the engine misfire from fuel buildup because the truck is greater than 5 years old. Your check engine light typically comes on when there is a problem with your emission control system or another computer-controlled system in your vehicle. A flashing check engine light is your Chevy Tahoe’s way of saying “I have a serious problem, don’t ignore me”. A misfire is also known as a "skip" and occurs when at least one engine cylinder fails to ignite the fuel and air mixture as expected with normal operation. The emission control system contains an array of sensors that work to reduce the amount of pollution released into the air. My 2003 Silverado "Check Engine" light came on while driving it on the 24th of April. What does that mean? A flashing check engine light usually refers to cylinder misfiring. Step by step instructions on how to figure why your engine is misfiring and how to fix it. 2003 Chevy Silverado check engine light on. Just yesterday the orange engine light started blinking when I'm accelerating. If you find one missing let us know and we we'll add it immediately! What would cause the battery light to stay on and effect the heat, ac? 2003 Silverado Check engine light flashing and truck in limp mode. Check engine light flashing car shaking is a clear sign of trouble. When the service engine light flashing is continuous, then you have a serious problem that can lead to grave damages if the problem is not addressed. Check engine light flashing. It does not give me a specific sensor. Check engine light began flashing and stabilitrak light came on. Low engine oil is not causing a flashing check engine light directly. Most of the time, that serious problem is a misfire. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. If that happens, you're looking at usually a few hundred dollars, on top of whatever the original problem is. When your engine is misfiring, it is dumping raw fuel into the exhaust. Chevrolet Silverado check engine warning light is generally associated with the emissions control system and it may light up or flash. A flashing check-engine light generally indicates that there is a failure in the emission control system. Oct 28 2013, 9:20pm. It stops flashing when I'm at a stop or under 25 mph or so to a constant being on, like it has been for a while. Check Engine Light Flashing and Car Shaking. What It Means When A Check Engine Light Is On Or Flashing Axleaddict Code p030 check engine light blazer repair you trailblazer check engine light on reading codes and other fun 2000 chevy s10 check engine light veser vtngcf org p0306 misfire 2004 chevrolet trailblazer you. Chevrolet Silverado 2007-2013: Why is My Check Engine Light On? Check engine light started blinking about 1 mo ago. See all problems of the … You could have a misfire or an major sensor failure. To help you narrow down your diagnostic approach, here's a look at the most common causes of the CEL in the Chevrolet Silverado 1500. I bought it about 2.5 hours from home so getting it back to dealer is last resort. My 4wd light is blinking in my 2003 Chevy silverado ; How do I reset the check engine light Heater blowes cold air sometimes and sometimes it blows hot 05 Chevy hd 6.0 regular gas mileage is about 14, now about 10. The engine light can be triggered by a number of issues of varying degrees of severity. Lights up: Reduce speed and engine load. SOURCE: 2000 chevy silverado z71 check engine light will not go off. check engine codes chevy silverado . Hey guys , just picked up a 2006 Chevy 3500 dually. Check engine light flashes on HWY. The misfire can be caused by a problem with the ignition system, or when the fuel system fails to … I am an introvert . Hasn't given me trouble so I thought nothing of it … In most cases, a misfire can cause the light to flash continuously. When on the highway it starts flashing the Check engine light then I come off highway and it stops … No trouble indicated prior to taking my 2001 Silverado in for inspection. Please use the form on our Contact Page to get in touch with us. The Check Engine light flashing is a pretty much universal sign that you have a misfire that is bad enough that a lot of raw, unburned fuel is being dumped in to the Catalytic Converter, to the point that it could be ruined if the problem is not taken care of very quickly. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. If your "check engine light" makes an appearance in your 2003 chevy silverado it may indicate a loose gas cap or a more serious issue like a failed o2 sensor, a larger emissions leak or problems with your vehicle's catalytic converter. Took it to a mechanic who reported fuel buildup. Check engine light flashing. If the check engine light starts flashing it can be for many different reasons and all of them can be serious causing the catalyst to get damaged and exceed emission out put from the engine. Jun 11 2013, 8:08pm. 2003 Silverado Check engine light flashing and truck in limp mode. You may also need to manually reset the light after making repairs if the code doesn't clear automatically. There are a variety of causes of misfiring and some are mundane such as old worn out spark plugs. GM has issued a service bulletin #PIP5147A to address a situation where you have a check engine light and retrieve trouble codes relating to a misfire. This is not usually urgent, but have diagnostic service done as soon as possible. Flashing Check Engine Light: If your check engine light is flashing, stop driving your Silverado 1500 and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. This flashing light should not be ignored. 2003 chevy silverado 4x4, 2500 series 158,000 miles Well taken care of, gets all scheduled maintenance, tuneups, flushes, etc etc I drive it about 18,000 per year, and it is heavily loaded- a veterinary unit is on the back. I was told that the pistons were broken as well. My car has an automatic transmission. Flashes: If the check engine light is flashing, it can potentially result in engine / catalytic converter damage. Misfiring should be investigated and resolved promptly - that’s why the light flashes versus simply staying steady - because misfiring can damage the catalytic converter which can result in additional costly repairs. We certainly understand how frustrating it can be to look for a code definition and have it not online when you need it. The computer is telling you to fix the problem before it destroys the converter. I have a 2003 Silverado 2500, 6.0 and The check engine light comes on and starts flashing right after I start it. Misfires are, in most cases resulting in a flashing check engine light. Check engine light and P0300 misfire codes on Silverado Sierra Fix P0300 misfire code on Silverado Sierra. We do our best to update these Chevy Check Engine Light codes as frequently as possible. The most common cause is misfires. The light generates a code that can help you narrow down the problem so you can get it fixed. An oxygen sensor reads the air and fuel mixture and lights up when it is out of range. Q: I have a 2003 Chevrolet Silverado and when I accelerate quickly on the freeway my truck will slightly hesitate and the check engine light will come on.. My car has 117660 miles. However, it can cause it indirectly. If I drive down the road and keep the throttle steady with no load on it the light goes off. check engine codes chevy silverado. The acceptable range is between 50 millivolts and 800 mV. I have replaced the plugs and wires and it did not change anything. A flashing "check engine" light on a Tahoe indicates that the computer system has detected a misfire in the ignition system.