FixVault

Home › Jaguar › 2000 › XJ8 Base › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Trouble Code Identification › DTC P1144: Air Assist Close Valve Circuit Malfunction › Possible Causes

Possible Causes

AACV power supply circuit fault.
AACV ground circuit fault.
AACV to ECM Pulse Width Modulated (PWM) drive circuit open, shorted or high resistance.
AACV failure.