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DTC 523821 Oil Lamp Circuit Open
Conditions for Setting the DTC
Engine Low Oil Pressure Signal
Check Condition-Engine running for greater than 10 seconds with engine speed greater than 500 rpm.
Fault Condition-No oil pressure signal for more than 5 seconds
Engine shut down
Circuit Description
The Oil Pressure Switch is used to communicate a low oil pressure condition to the ECM. Engine
damage can occur if the engine is operated with low oil pressure. This fault will set if the oil pressure
switch remains closed with the engine running. The switch is set to open above 6 PSI.
Circuit Description
Never assume the fault is due to an electrical malfunction. Low oil pressure can damage the engine. Verify
oil pressure before proceeding with this diagnostic.
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