When in warm weather or after driving a lot of stop and go, my 1996 Pontiac Grand Prix doen not shift properly. The check engine light comes on and it wont shift up to the next gear.

Asked by scgnfshn Aug 20, 2013 at 08:11 PM about the 1996 Pontiac Grand Prix 2 Dr SE Coupe

Question type: Maintenance & Repair

This all started when I sprayed off my engine at the car wash. I went to accelerate and it wouldn't go. After letting up on the gas it would slowly accelerate. When the check engine light comes on I can shut off the car and restart it and it runs fine for awhile. Has me stumped

10,815

Norm answered 11 years ago

4T65E tranny? Sounds like the car is going into "limp home" mode when hot. See if you can get the OBD code, Pep Boys will read it for free and maybe even tell you what's going on. "Limp" mode puts the tranny in 3rd gear, which translates into very slow acceleration, engine light on, and a top speed of about 50. You may have gotten some water into a connection, and there's a ton of them under the hood. Suspect the Powertrain Control Module (PCM). Good luck hope that helps.

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When in warm weather or after driving a lot of stop and go, my 1996 Pontiac Grand Prix doen not shift properly. The check engine light comes on and it wont shift up to the next gear.

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When in warm weather or after driving a lot of stop and go, my 1996 Pontiac Grand Prix doen not shift properly. The check engine light comes on and it wont shift up to the next gear.

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