Auto Answers » View Question
ellsworthglass1
ellswo ... 12/31/2012
2007 GMC Yukon Denali 8Cyl6.2L - Engine
code for 2007 yukonpo121 engine po724 trans
1 Answer
  • Jimm
    Jimm 1/1/2013
    P0121 means Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem. P0121 occurs when the PCM has detected a throttle angle that is significantly higher or lower for the specified engine RPM (revolution per minute).

    Possible Causes:

    Open or short in the TPS wiring or circuit
    Loose or contaminated TPS connector
    Defective PCM

    Possible Solutions:

    Repair or replace TPS wiring or circuit
    Tighten or replace TPS connector
    Replace PCM

    P0724 = Torque Converter/Brake Switch B Circuit High
    The purpose of this circuit is to prevent the engine from stalling while driving in lock-up condition, when
    brakes are suddenly applied.
    When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in progress.

    INSPECT STOP LAMP SWITCH ASSY
    CHECK HARNESS AND CONNECTOR(STOP LAMP SWITCH ASSY - ECM)
    Reply
    0
    Jimm
    ellsworthglass1 1/2/2013
    thank you jimm
close

Preview Answer

 
AutoMD Verified Customer
AutoMD obtained proof this customer interacted with the shop.