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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> DTC P0298: - Engine Oil Over Temperature Condition

DTC P0298: - Engine Oil Over Temperature Condition

DTC P0298: - ENGINE OIL OVER TEMPERATURE CONDITION

Description:  Indicates the engine oil temperature protection strategy in the powertrain control module (PCM) has been activated. This temporarily prohibits high engine speed operation by disabling injectors, to reduce the risk of engine damage from high engine oil temperature. On engines equipped with an oil temperature sensor, the PCM reads oil temperature to determine if it is excessive. When an oil temperature sensor is not present, the PCM uses an oil algorithm to determine actual temperature. Engine shutdown strategy function is the same on vehicles with and without oil temperature sensors.
Possible Causes: 
  • Very high engine RPM for an extended period of time
  • Overheating condition
  • Damaged engine oil temperature (EOT) sensor or circuit (vehicles with an EOT sensor)
  • Base engine concerns
Diagnostic Aids:  The engine is operating in high RPM range due to incorrect gear selection. This may cause a lack/loss of power or surge.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
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