2005 Aveo Hatchback; "hold" light blinking; check engine light stays on; engine is chugging along - slows down..... HELP!
Check tps sensor (throttle position sensor in backside of the throttle cable) and map sensor (manifold absolute pressure on front little 1 inch sensor with vacuum line) make sure there plugged in. the ecm (engine control module driver side inner fender) and tcm (transmission control module under dash) both need the data to know when to upshift and increase fuel/air. Otherwise the computer runs default values and guesses off of other sensors giving poor performance. also disconnect battery for 15 min. usually resets aveo service lights if you dont have a scanner.
I had the same problem with a 2005 Chevy abroad I put a transmission in it was giving me a p300 and a p0781 code and the engine light and hold light was flashing. I end up having to get a used TCM and harness and the Ecm off another car and that fixed my problem.
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When I am driving my check engine Light and hold light will come on and start blinking. What would cause this and how do I change the TPS
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