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Home › Jaguar › 2000 › XJR › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Trouble Code Identification › DTC P1631: Throttle Motor Relay Coil Activation Circuit Failure › Possible Causes

Possible Causes

Throttle motor relay coil to ECM circuit open, shorted to ground or shorted to voltage.
ECM failure.