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If one of the sensors is bad, the computer is receiving faulty information. After that, it turns them into harmless steam. YourMechanic All rights reserved. If you are not sure when diagnosing the reasons. proclaimliberty2000 230K subscribers Subscribe 354K views 3 years ago Watch at proclaimlibery2000 why you should never drive a car with a. The engine light comes on when I start the car and then goes off. All Rights Reserved. Most of the time around town is alright. In most times, engine misfire is the reason for the occurrence of a flashing light engine. Within the engine, there are a number of sensors working together to feed information to the computer. Therefore, if it detects that the intake air flow sensor is faulty, the Check Engine light icon will light up to notify. 2010. There is always a reason why the check engine light turns on. Check engine light | Chevy and GMC Duramax Diesel Forum The check engine light flashing and going off is trying to inform the driver that there is an irregularity in the car system. Mechanic first changed 4 plugs. Just look at 8 common reasons below: An oxygen sensor in the car is an electronic device that measures the residual oxygen concentration in the exhaust gas of the car, in order to help the engine adjust the appropriate level of fuel injection. The Check Engine Light might be one of the most recognizable, but most people see it come on as a solid light. The catalytic converter may also fail because of a blockage in its exhaust ports. This means you can leave the tool connected. leading the Check Engine light to come on. Additionally, if you dont have your own scanner, there are other options. The truth is that the check engine light only provides an idea of the damage. I changed both bank 1 o2 sensors. This will reduce engine efficiency, causing vibration, car jerks when accelerating, difficulty starting, car stalling, >> Read more:The Definitive Guide on How to Check Spark Plugs. Chevy Silverado: Flashing Check Engine Light Diagnosis This fuse can be the circuit that is having a short circuit. Engine Auto Stop-Start Not Working Troubleshooting. For instance, visit a mechanic when you hear unusual noises in it. 97 it's a, I have a 2007 h3 hummer base model. Currently, on the market, there are also many types of car error readers at cheap, compact, and convenient prices.