FixVault

Home › Jaguar › 2000 › XJ8 Base › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Trouble Code Identification › DTC P0066: Air Assist Close Valve Circuit Malfunction › Possible Causes

Possible Causes

AACV power circuit failure.
AACV ground circuit fault.
AACV to ECM pulse width modulation drive circuit open, shorted or high resistance.
AACV failure.