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Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 23692
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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CHECK ENGINE LIGHT..OVERDRIVE IS ON, TRANS NOT SHIFTING LAST GEAR

Customer Question

CHECK ENGINE LIGHT ON , LIGHT HOLD BLINKING, OVERDRIVE IS ON, TRANS NOT SHIFTING LAST GEAR
Submitted: 5 years ago.
Category: Chevy
Expert:  Dan replied 5 years ago.

Welcome to JustAnswer, my name is XXXXX XXXXX I'm here to help get your problem resolved. Ask follow up questions, thanks.

 

It sounds like the coolant temp sensor may have failed which can cause this. You can have diagnostic codes checked for free at parts store so if it indicates anything related to coolant temp sensor then replace.

Customer: replied 5 years ago.
code p0300,misfire, i instol new spark plugs, cable, coils, i check vakuum for leaks, and while i drive car engine light coming on and hold light is on while trans needs shift last gear , hold light is blinking all the time and trans mist last gear
Expert:  Dan replied 5 years ago.

Is coolant temp accurate when code sets? Does it run rough?

Customer: replied 5 years ago.
coolant temp is accurate,engine run good, no misfire
Expert:  Dan replied 5 years ago.
Ok, it sounds like you may need to have a crankshaft position relearn procedure done with a factory scantool....The one thing you can try first is disconnect battery and touch cables together for 15 minutes with battery disconnected to clear memory..If that doesnt help relearn procedure will need to be done on scantool.
Customer: replied 5 years ago.
its doesnt help
Expert:  Dan replied 5 years ago.
You just tried the relearn?