What is causing my check engine light to flash. I have had the plugs, ignition coil and valve cover gasket replaced.

Asked by Oct 21, 2015 at 10:46 AM about the 2005 Chevrolet TrailBlazer

Question type: General

why is my check engine light flashing again after the plugs, ignition coil and valve cover gasket have been replaced?

3 Answers

65,345

If the check engine light is flashing it indicates there is a miss fire of one or more cylinders. When the miss fire occurs raw fuel is dumped into the exhaust. This fuel will burn at the catalytic converter overheating and possibly melting the inside of it. Do NOT drive a vehicle with a flashing check engine light or you may do damage to the converters. Sounds like you need to get the trouble code read and do some more diagnosis.

2 people found this helpful.

Thank you sir!!!

65,345

For a good explanation of flashing check engine light go to the link.....http://blog.carmd.com/flashingcheckenginelight/

1 people found this helpful.

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