Last post on Jun 01, 2013 at 2:35 PM
You are in the Pontiac Grand Prix
What is this discussion about?
Pontiac Grand Prix, Engine, Sedan
Go to NHTSA to file a safety complaint.
Or call Monday-Friday (8 am to 8 pm ET) (888) 327-4236 TTY: (800)424-9153
#329 of 361 Re: 2002 Pontiac Grand Prix Keeps Cutting Off Please Help [gw76]
Aug 25, 2012 (9:54 pm)
I had the same problem with my 2003 grand prix gtp - the fix for my car was
the crank sensor.
Took research on my part to figure out the problem - no mechanic could figure it out..
#330 of 361 Re: 2002 Pontiac Grand Prix Keeps Cutting Off Please Help [fastredgtp]
Aug 26, 2012 (12:47 am)
I had a similar problem on my 1999 GP. The deale,r after several days of checking things out, replaced the crankshaft positioning sensor and the problem went away. The other thing you may keep in mind is the mass airflow sensor. The part is around $150, it is a 5 minute job. Mass air flow sensor throws a diagnostic code. The crankshaft sensor didn't.
#331 of 361 Re: 2007 Grand Prix won't start [darlaj]
Sep 05, 2012 (10:52 pm)
Did anyone ever figure out what the problem was? I have the same issue with my 2006 Grand Prix. It seems to just stop running when it gets too hot, and it's been a hot summer. It's been to the garage three times now. First battery and starter, and crank shaft sensor, then the second mechanic found a wire in the ignition that came apart when it was hot, but now a month later, the same issue, and the mechanic says it's something different but they can't figure it out.
Everyone I talk to says it's electrical, but it sounds exactly the same as the problem you had. Can you let me know what finally solved this issue for your grand prix?
#332 of 361 Re: 2007 Grand Prix won't start [lisa121]
Sep 06, 2012 (7:16 am)
Good morning lisa121,
Is the garage you're working with one of our GM dealerships? Just asking to see if there's anything we can look into! Let us know if we can be of any assistance.
Sarah, GM Customer Service
#333 of 361 Re: 2007 Grand Prix won't start [lisa121]
Sep 06, 2012 (4:19 pm)
sorry, I never have found out. It will start and run perfectly, start again if I try within 5-10 minutes of shutting off, otherwise I have to wait 2 to 2-1/2 hours for it to start again.
Right now I just leave it running with a spare key if I make short trips.
So far have changed ignition control and crank sensor, guess I have to save up money for the big diagnostic check that won't fix it anyway.
Seems like something overheats in the cooling system and has to cool completely before it starts again. Hoping in this cold climate it will at least be an easier problem in the winter.
Sorry......just hating this engine
#334 of 361 Re: 2007 Grand Prix won't start [gmcustsvcsarah]
Sep 06, 2012 (4:38 pm)
No, I'm not dealing with the dealership. If I went to the dealership they'd charge me hourly, and there's no way I could afford it. My car is at Active Green and Ross right now, which have been very good at diagnosing in the past, but this time, there are no codes when they do a diagnostic, and sometimes it stalls, and starts, and sometimes it doesn't start. It seems to be bad when it's really hot out.
It seems that there are a lot of Grand Prix cars, different years, that all have the same problem. If you can help, I'd like you to tell me what it could be, or what other people have found to be the problem, when this problem occurs.
#335 of 361 My 2002 Pontiac Grand Prix...
Sep 17, 2012 (9:32 am)
... is having this exact same issue. Must be a flaw in that model. I'm thinking my next car will be a Ford. But right now it's not starting for the 3 out of 7 times we tried in the past 24 hours. Sometimes it'll start and sometimes it won't. I've been told it could be the alternator, starter engine, battery issue, solenoid, radiator safeguard, etc. We took it to an auto parts store for diagnostic but no codes came up.
#336 of 361 Re: 2007 Grand Prix won't start [darlaj]
Nov 13, 2012 (11:28 am)
I have the same issue with my 2007 Grand Prix. This is the list that I have changed Ignition Contol Module, Ignition Coils, Plug Wires, Spark Plugs. With the same result of when it gets to operating temperature it cuts off and will not start until the car is completely cool. Took the car to the GM dealer and they told it was the Crank Position Sensor and replaced that along with another Ignition Control Module and when they wnet to take the car back to the wash bay the car cutoff again on them. Now the car is still in the shop for the issue of the car cutting off and the car did not put any codes out. The Check Engine Light does not come on at all. I also contacte Pontiac Customer Service to make them aware of this issue. I talked to a lady named Cheer like the singer at 1-800-762-2737. This is a real safety issue with the Grand Prix. The lady took my information and where the car is at the GM delearship. She said she will have a regional techical representive that works with the dealer ships in the are you live in. When the service advisor called me and it was the Crank Position Sensor, I asked if he was 100% sure that was the problem. He said he was 150 % sure and they replaced the Crank Position Sensor and it cut off again before I even got the car back. I told him about what I was reading about this issue is that would not fix this issue and now they realize that what I was telling them is the truth and now they are still trying to figure out what the problem really is. I will keep everyone posted on the outcome. To all those with same issue I will suggest contacting Pontiac Customer services and let your voices and concerns heard and maybe something good will come out of it.
#337 of 361 Re: 2007 Grand Prix won't start [edwardk756]
Nov 13, 2012 (10:43 pm)
Your problem does not sound like the crankshaft positioning sensor problem, I don't know why the dealer thought so, the symptoms for that are different. Crankshaft sensor problem is not heat related, it has to do with the firing order of the cylinders and the car starts up when you restart whether it is cold or hot. I didn't see the mass air flow sensor on your list, did they look at that. The only thing is that usually throws a code, you don't have a code. I called GM when my GP was dying on he highway suddenly going 60 70 miles/hr, they did a nice job of dodging the issue even though it is a safety issue.
#338 of 361 Re: 2007 Grand Prix won't start [pontiaclives]
Nov 14, 2012 (6:04 am)
Well here is the verdict on this issue. The aftermarket Ignition control (DURALAST) I put in the vehicle in place of the original Iginition control module because I thought it was the problem. When the Crank Position sensor shorted out when the car gets warm causes the car to cutoff. When the car is cold it will start up. When they replaced the Crank Position Senor and put the replacement aftermarket Ignition control which was the second one in a week. The aftermarket Ignition Control Module would get super hot and cause the car to cut off again. The dealership put the original GM Ignition Control Module in the car the car stayed running the drove it a 100 miles and the never cut off. When they finished their 100 mile test drive they took off the GM Ignition Control Module and it was cool not hot at all. So the original issue was the Crank Position Sensor not sending crank signal to Ignition Control Module. They replace the Crank Position Sensor and test drove to heat up car to Operating temp. What
They retested with car in a hot condition and did a pin to pin test of Crank Position to Ignition Control had crank signal. Then pin to pin Ignition Control to Power Control Module had crank signal also pin to pin back to the Ignition Control from Powertrain Contol Module and had ignition signal for coils to fire.
The Crank Position Sensor is behind the Harmonic Balancer in the engine block. When engine heats up the Crank Sesor is succeptible to the heat of engine and faults out and cause car to cut off.
Pontiac Customer service was deeply involved finding the issue and root cause.