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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (LGH) - DTC P0016 Through DTC P11DC >> Diagnostic Information and Procedures >> DTC P049D >> Testing >> Circuit/System Testing

Circuit/System Testing

NOTE:

Perform the Circuit System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, remove the Q14 EGR valve. Refer to Exhaust Gas Recirculation Valve Replacement .
  2. Inspect the Q14 EGR valve for the following conditions:
    • A sticking, binding, or frozen EGR valve
    • Any coking, soot build up, debris or damage that can cause the EGR valve to stick partially open or closed
    • If a condition is found, replace the Q14 EGR Valve.
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