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Home >> Buick >> 2008 >> Allure CX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.8L - DTC P0385 To DTC P2108 >> DTC P0385 >> Component Test
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Component Test

  1. Inspect the CKP sensor for looseness and correct installation.
  2. Connect jumper wires from the CKP sensor connector 12-volt reference and the low reference to the CKP sensor; turn ON the ignition, with the engine OFF.
  3. Connect a DMM to the CKP sensor signal at the CKP sensor and observe the Duty Cycle. Pass a steel object by the sensor repeatedly. The Duty Cycle should increment.
    • If the Duty Cycle does not increment, replace the CKP sensor.
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