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Home >> GMC >> 2008 >> Envoy 4.2 S, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P0366 To DTC P2444 >> DTC P0366 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, inspect the CMP sensor for correct installation.
    • If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.
  2. Inspect the engine for the following conditions:
    • The engine oil for debris
    • The camshaft reluctor wheel for damage
    • The timing chain, tensioner, and sprockets for wear or damage
    • If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components. Refer to Camshafts Cleaning and Inspection .
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