Pontiac Grand Prix Problems

Engine Control Module (ECM) can fail on Pontiac Grand Prix

Problem Description and Possible Solution

The Engine Control Module (ECM) can fail causing stalling, and engine and transmission drivability concerns.

(38 people reported this problem)

Pontiac Grand Prix Vehicles With This Problem

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Average mileage: 122,014 (19,450–195,000)
12 model years affected: 1991, 1992, 1993, 1994, more2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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Brake problem? Or maybe a faulty head gasket cylinder?
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Viewing 1-10 of 10 comments
Engine stops unexpectedly when driving. Mostly it is at low speeds, but it has happened on the highway a few times as well. Sometimes the engine has enough RPM that it re-fires on its own, but sometimes I need to shift to neutral and manually restart it.
It did stall one time in the middle of an intersection! that could have been really bad! I do not feel safe driving this car and am going to park it until I can sell it or trade it off.
Just started, I have multiple warning lights coming on, check engine, brake stabilizer, traction control light, etc. What do I do? Is it the ECM?
My Grand Prix just shut off one day at a stoplight. It was dead. Had it towed and turned out to the be the ECM. It was $800 repair.

You'll know when it happens, it's like I was out of gas.
Engine stalls and shuts off going down the road. Have to stop and put it in park and it will crank. Also does this problem when vehicle is idling
Fails emissions with recurring code. Replaced many sensors and valves still same problem. Mechanic said computer needed reprogrammed.