P0522
DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage
Refer to Engine Control Schematics Automatic Engine Shutdown and Warning .
Circuit Description
The engine oil pressure (EOP) sensor is mounted in the top rear of the engine. The EOP sensor measures changes in engine oil pressure. The EOP sensor has a 5 volt reference, a ground and a signal circuit.
The EOP sensor changes resistance based on engine oil pressure. When the PCM senses a signal voltage lower than the normal operating range of the sensor, this DTC sets.
Conditions for Running the DTC
The engine is running
Conditions for Setting the DTC
The engine oil pressure sensor voltage is less than 0.48 volts
Action Taken When the DTC Sets
* The PCM stores the DTC information into memory when the diagnostic runs and fails
* The malfunction indicator lamp (MIL) will not illuminate
* The PCM records the operating conditions at the time the diagnostic fails
The PCM stores this information in the Failure Records.
Conditions for Clearing the MIL/DTC
* A History DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic
* A last test failed (Current DTC) will clear when the diagnostic runs and does not fail
* Use a scan tool in order to clear the MIL/DTC
Diagnostic Aids
Important: Remove any debris from the PCM\TAC module connector surfaces before servicing the PCM\TAC module. Inspect the PCM\TAC module connector gaskets when diagnosing/replacing the modules. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM\TAC modules.
* Inspect the PCM\TAC module connector.
* The following may cause an intermittent:
- Misrouted harness
- Rubbed through wire insulation
- Broken wire inside the insulation
* The PCM 5 volt reference circuits are internally connected within the PCM. If all the engine oil sensor circuits check to be OK, inspect related 5 volt reference circuits.
Test Description
The number below refers to the step number on the diagnostic table.
2. This step determines if the malfunction is present. For any test that requires probing of the PCM or any component harness connectors, use the connector test adapter kit. Using this kit prevents damage to the harness connector terminals.
3. Using the Freeze Frame and Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and Failure Records data can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can also help determine how many ignition cycles the diagnostic reported a pass and a fail. Operate vehicle within the same Freeze Frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed.
4. If the scan tool displays 5.0 volts, this indicates that the engine oil pressure sensor signal, 5 volt reference circuit and PCM are OK.
5. If the scan tool displays 5 volts, this indicates that the engine oil pressure sensor signal circuit and PCM are OK.
6. Disconnecting the PCM allows using the DMM to check the continuity of the circuits. This aids in locating an open or shorted circuit.
