P1383 Mercedes-Benz Variable Cam Timing Overretarded (Bank #1)

P1383 Mercedes-Benz Variable Cam Timing Overretarded (Bank #1)

Possible causes
  • Cam timing improperly set.
  • Continuous oil flow to the VCT piston chamber.
  • VCT solenoid valve stuck open.
  • Camshaft advance mechanism binding (VCT unit).
    • Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1383 Mercedes-Benz Description

    The comprehensive component monitor (CCM) monitors the VCT position for over-retarded camshaft timing. The test fails when the camshaft timing exceeds a maximum calibrated value or remains in a retarded position.

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