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The check engine light comes on at start up for a bulb check. If it stays on with the engine running the computer has detected a malfunction. You need to have it checked for codes.
AnswerWith an OBD2 scan tool.Possibly by unhooking the battery.
How do you reset check engine light for the 2009 Chevy trail blazer?
check your fluids my camaros light was on and i ignored it i blew my engine
You can either bring it in to a Chevy dealer or use a programmer/tuner to reset the check engine light.
unhook the battery for about ten minutes
If the check engine light is blinking that means an engine cylinder misfire has been detected
Check
defective battery cable or needs tune up
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle.
It requires an engine scanner to do that.
No, only a problem that effects emissions will set the check engine light.