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Home › Jaguar › 2000 › XJR › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Trouble Code Identification › DTC P1606: Ems Control Relay Malfunction › Possible Causes

Possible Causes

ECM control relay failure.
ECM control relay to ECM circuit fault.
ECM control relay coil power supply circuit open.
ECM ground circuit fault (relay coil drive).