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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 423 (Engine Control System - DTC) >> DTC P2138: App Sensor >> Diagnostic Procedure >> 4. Check APP Sensor Ground Circuit For Open And Short
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4. Check APP Sensor Ground Circuit For Open And Short

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check harness continuity between ECM terminal 82 and APP sensor terminal 4, ECM terminal 83 and APP sensor terminal 5.

    Refer to WIRING DIAGRAM.

    1. Continuity should exist. 
  4. Also check harness for short to ground or short to power.

OK or NG 

  1. OK : GO TO 6 .
  2. NG : GO TO 5.