I had Mechanic change my spark plugs and now couple of days later the engine light is constantly blinking what does that me and the car is running real rough and a service traction control light keep
My 06 DTS I change the plugs and I was
running really rough and the engine light is
blinking all day long when I drive the car
what does that mean
If check engine light are blinking DO NOT DRIVE THE CAR. Bring the car back to the mechanic before more damage into the engine.
A flashing check engine light is warning you that the engine is misfiring and damaging the catalytic converter. Probably one of the spark plug wires wasn't on tight and fell off. I had that happen to me once. Definitely take it back to whomever did the tune up. HTH. -Jim
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