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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 51 (2.0L - DTCS P2127 To P2400) >> DTC Troubleshooting >> P2166 Accelerator Pedal Position Sensor 1 Maximum Stop Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

    Did the DTC return?

    Yes 

    • Go To  2

    No 

    NOTE:

    This DTC is set when the APP Sensor values are learned in-plant but do not reach the minimum or maximum voltage range.

  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any other APP Sensor or 5-Volt Supply DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. PERFORM THE ETC RELEARN FUNCTION AND RETEST FOR DTC 
    1. With a scan tool perform the ETC RELEARN function.
    2. With the scan tool, erase DTCs.
    3. Start the engine.
    4. With the scan tool, read DTCs.

      Is the DTC active or pending?

      Yes 

      • Replace the APP Sensor in accordance with the Service Information. After installation is complete, perform the ETC RELEARN function.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Performing the ETC RELEARN function repaired the fault.