P0523

DTC P0523

Circuit Description

The engine oil pressure (EOP) sensor changes resistance based on engine oil pressure. The PCM monitors the signal circuit of the EOP sensor. When the oil pressure is high, the sensor resistance is high and the PCM senses a high signal voltage. When the oil pressure is low, the sensor resistance is low and the PCM senses a low signal voltage.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

The PCM detects that the oil pressure sensor signal circuit is greater than 4.6 volts.

Action Taken When the DTC Sets

* The PCM records the operating conditions at the time the diagnostic fails. The PCM displays this information in the Failure Records on the scan tool.
* The malfunction indicator lamp (MIL) will not illuminate.
* The EOP gauge displays 0 psi (0 kPa).

Conditions for Clearing the DTC

* The DTC becomes history when the conditions for setting the DTC are no longer present.
* The history DTC clears after 40 malfunction free warm-up cycles.
* The PCM receives a clear code command from the scan tool.

Diagnostic Aids

* Using the Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail.
* Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.
3. This step tests for the proper operation of the circuit in the low voltage range.