Possible Causes
- The powertrain control module has detected a ground measurement for a period longer than expected or has detected a ground measurement when another value was expected
- Engine management system relay power and ground circuits open circuit
- Engine management system relay circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Control Module Signal Name
- Circuit reference O_S_MRLY Control
- Connector is disconnected, connector pin is backed out, connector pin corrosion
- Engine management system relay failure