1996 Pontiac Grand Am 4 cyl Front Wheel Drive Automatic
I have a 1996 Pontiac Grand AM with a 2.4 4Cyl. It is my neices car and these codes are not something that I am firmiliar with so I am looking for a little information or input on it.
The car sometimes runs for 2 weeks at times it wont start at all and sometimes it dies on her while driving. I have never had the car in my presence when it fails to start so I am going off what I have been told by my neice as well as the things that I have observed.
The codes I retrieved from the code history was a P1629 and P1601. A few weeks ago while I had it in the garage and hooked to the scanner on ititial startup all the warning lights in the dash came on and when I looked at the data on the scanner all the readings were at max values or irratic readings, and as soon as I shut the car off and restarted it all the lights went out and it was fine and all readings on the data screen went back to normal.
This week it failed to start for her and later in the day when my dad tried to start the car and it did start but the tachometer was irratic even when the car was at an idle. My neice drove it to my house and she said the tachometer never worked all the way to our house. I started the car today and pulled the codes and the tach worked just fine and all the reading in the data stream seem to be at normal values in closed loop.
I know the code P1629 is for the pass1 or theft device in the car and as far as I know the pass1 will not shut down the car while driving, but only prevent it from starting initially. The code P1601 I assume is a PCM code? I know these cars had issues with the IPC but I want to lean more toward a PCM problem?
I would appreciate any input I could get! Is there a flowchart available to troubleshoot the pass1 on this car? From what I have read the IPC is the master of the theft system and it communicates with the other modules (PCM, DERM, EBCM) to complete the system.
Thanks in advance for any input!
have the same problem?
Saturday, March 7th, 2009 AT 4:54 PM