P0124-TPS/APP INTERMITTENT





For a complete Transmission wiring diagram Refer to Section 8W

Theory of Operation


The Accelerator Pedal Position Sensor (APPS) is a linear potentiometer. It provides the ECM and the TCM with a voltage signal proportional to the angle, or position of the accelerator pedal. The APPS signal along with inputs from other sensors is used by the ECM and the TCM to calculate the throttle position.


  • When Monitored:

    Continuously with the ignition on and engine running.

  • Set Condition:

    This DTC will set if the monitored TPS throttle angle between the angles of 6° and 120° and the degree change is greater than 5° within a period of less than 7.0 msec.


Possible Causes
  
RELATED TPS ENGINE DTC'S PRESENT
  
THROTTLE POSITION SENSOR
  
TRANSMISSION CONTROL MODULE
  

Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)



Diagnostic Test

1.DETERMINING IF RELATED ENGINE TPS DTC'S ARE PRESENT



Are there any Engine TPS/APPS DTCs present?

Yes


No
  • Go To 2

2.CHECK TO SEE IF DTC IS CURRENT



NOTE: To erase EVENT DATA information, a BATTERY DISCONNECT must be performed. Performing a BATTERY DISCONNECT may reset all learned transmission values to controller default. This may lead to erratic shift schedules.





Did the DTC P0124 TPS/APPS INTERMITTENT, reset?

Yes
  • Go To 3


No
  • Go To 4

3.CHECK THROTTLE POSITION SENSOR OPERATION





Was the TPS/APPS 1 voltage change smooth and consistent?

Yes
  • Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. With the scan tool, perform QUICK LEARN.
  • Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)


No

4.INTERMITTENT WIRING AND CONNECTORS






Were there any problems found?

Yes


No
  • Test Complete.