P1521-INCORRECT ENGINE OIL TYPE
When Monitored and Set Conditions
When Monitored:
- With the engine running
Set Conditions:
- The engine oil pressure never reaches the calibrated specification to allow the VCT activation.
Default Actions:
- MIL is illuminated on the second consecutive trip that the diagnostic fails.
- The MIL will be turned off on the third consecutive trip that the diagnostic passes.
The following conditions must be checked.
- OEM recommended oil viscosity is being used.
- Customer is following the oil change schedule.
- Check the engine oil for contamination. (i.e., fuel and/or engine coolant)
- Internal engine condition that may effect oil pressure.