Question about 2001 Pontiac Grand Am SE

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"Trac off" light came on

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  • kewill66 Nov 13, 2010

    Thank you so much for your response. What I'm not clear on is this....now that my car won't start...it turns over but won't stay cranked (headlights, wipers, etc. all work)...is it caused by the same problem that you described?? Also no other indicator lights have been on. Will doing the service on the transmission allow it to crank??

  • kewill66 Nov 13, 2010

    also...the parking brake was not on as I was driving and I was going u a slight incline (less than 20%) on dry road when the "Trac Off" light came on.

  • kewill66 Nov 14, 2010

    THANK YOU SO VERY MUCH!!! You were absolutely right it was the fuel pump. $600 ($50 towing fee and $50 tax) later and I'm rolling again. Thank you for letting me have a starting point as opposed to racking up "diagnostic" fees. I will recommend you and this site to all my family and friends.

  • kewill66 Nov 14, 2010

    He was right and his rating of "Guru" is well deserved. I happened across this site randomly and so very glad that I did.

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Hi!!
Traction Off

  • IPC (Instrument Panel Control) illuminates Traction Off indicator when following occurs:
  • EBCM inhibits traction control system. IPC receives a class 2 serial data message from EBCM requesting illumination.
Traction control system is disabled when following occurs:
  • Body Control Module (BCM) detects traction control switch is pressed (signal circuit is low).
  • EBCM receives a class 2 serial data message from BCM indicating switch status.
  • BCM detects parking brake is engaged (signal circuit is low) and engine is on.
  • EBCM receives a class 2 serial data message from BCM indicating parking brake status.
  • PCM detects certain malfunctions and is unable to perform torque reduction requests from EBCM. EBCM receives a class 2 serial data message from PCM indicating that traction control cannot be performed.
  • EBCM detects a malfunction in traction control system. IPC receives class 2 serial data messages from EBCM requesting illumination of both service vehicle soon and traction off indicators.

If you have a problem with the engine stalling, it could be the Transmission TCC Solenoid stuck in the ON or APPLY position or solenoid exhaust is plugged.
If the TCC is the problem, the Check Engine or MIL light should be on. Have the codes checked. You can borrow a code scanner from AutoZone, Checkers or similar auto parts store to be sure.
In the mean time, servicing the transmission (changing the transmission fluid and filter) $35 + labor could be of great help.
Good Luck!! Keep me posted

Posted on Nov 13, 2010

  • Rene J Solis Nov 13, 2010




    1. Tank you, for your clarification. At first I thought it was a transmission problem. Check the fuel pump pressure. At about this time (9-10 yrs.) the fuel pumps start to give up. The TRAC OFF light may have come on for a different reason. The fuel pump is a very good guess of what's wrong with your vehicle. I have an Aurora 3.4L Engine, the transmission has not giving me any trouble but I had to replace the fuel pump last year and I had a few customers with the same problem.Check the fuel pump pressure (borrow a tester from an auto parts store) it's easy to use, look at the diagram bellow for how to hook it up. The Fuel System Pressure should be:

      2.4L 53-59 psi (3.8-4.2 kg/cm2 )

      3.4L 52-59 psi (3.7-4.2 kg/cm2 )


      IF PRESSURE IS LOWER THAN SPECIFIED, REPLACE PUMP.





      KEEP ME POSTED


  • Rene J Solis Nov 13, 2010

    Check fuel pump pressure, borrow a tester from an auto parts store. There should be a Schrader valve on the fuel rail to hook up the tester to. Check the diagram below on how to check fuel pump pressure. the Fuel System Pressure should be:



    2.4L ENGINES 53-59 psi (3,8-4.2 kg/cm2)

    3.4L ENGINES 52-59 psi (3.7-4.2 kg/cm2)



    IF PRESSURE IS LOWER THAN SPECIFIED, REPLACE FUEL PUMP




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