521
UnclassifiedLubrication
What This Code Means
Oil pressure less than normal operating pressure; MIL ON; Engine Shutdown; Oil leaking past seals and rings; Oil Pressure High
Possible Causes
- •Restriction in the oil flow path
- •Malfunctioning oiling system
- •Intermittent problem
- •Oil pressure circuit shorted-to-ground in harness
- •Faulty ECM
- •Faulty Oil Pressure Switch (short circuit)
- •Faulty engine oiling system
Suggested Actions
- 1Perform On-Board (OBD) System Check
- 2Warm engine at idle to normal operating temperature and increase RPM above limit set in diagnostic calibration
- 3Disconnect harness from Oil Pressure Switch
- 4Clear DTC 521
- 5Operate engine at idle for at least one minute and increase RPM above limit set by diagnostic calibration
- 6Verify engine oiling system with mechanical gauge
Related Power Solutions International Fault Codes
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