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Diagnostic Aids

Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.

Refer to Testing for Intermittent Conditions and Poor Connections .

DTC P0521

Step Action Values Yes No
Schematic Reference: Instrument Cluster Schematics 
Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine ON.
  3. With the scan tool, observe the Engine Oil Pressure Sensor parameter in the engine control module (ECM) instrument panel cluster (IPC) Data list.
Does the Engine Oil Pressure Sensor parameter display values that vary within the specified values when idling and accelerating the engine?		 0.7-2.5 V
8-880 kPa (1.16-127.6 psi)		 Go to Diagnostic Aids Go to Step 3 
3 Replace the engine oil pressure (EOP) sensor. Refer to Engine Oil Pressure Sensor and/or Switch Replacement for the 4.6L engine or Engine Oil Pressure Sensor and/or Switch Replacement for the 4.4L engine.
Did you complete the replacement?		 - Go to Step 4  -
4
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 - Go to Step 2  System OK
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