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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Manual Transmission - TREMEC 6-Speed (M3L Mg9)) >> Diagnostic Information and Procedures >> DTC P086A-P086D: Neutral Position Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC P0641 is not set.
    • If DTC P0641 is not set 
  3. Place the gear shift lever in the neutral position.
  4. Verify the scan tool the Neutral Position Sensor parameter displays Neutral.
    • If the parameter does not display Neutral 

      Refer to Circuit/System Testing.

    • If the parameter does display Neutral 
  5. Place the gear shift lever in 1st gear.
  6. Verify the scan tool Neutral Position Sensor parameter displays In-Gear.
    • If the parameter does not display In-Gear 

      Refer to Circuit/System Testing.

    • If the parameter displays In-Gear 
  7. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
  8. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  9. All OK.
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