DTC P0522. Cadillac SLS 2008

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2008 🢒 SLS 🢒 DTC 🢒 DTC P0522

DTC P0522 3.6L (LY7)

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC 0522: Engine Oil Pressure (EOP) Sensor Circuit Low Voltage

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Engine Oil Pressure 5-Volt Reference Circuit	P0522	P0522	--	P0521
Engine Oil Pressure Sensor Signal Circuit	P0522	P0522	P0523	P0521
Low Reference	--	P0523	--	P0521

The engine oil pressure (EOP) sensor changes voltage based on engine oil pressure, and it is a 3-wire sensor comprising of the signal circuit, the low reference circuit and the 5-volt reference circuit. The engine control module (ECM) supplies 5 volts to the EOP sensor via the 5-volt reference circuit and provides ground via the EOP low reference circuit. The ECM monitors the signal circuit of the EOP sensor to determine if the engine oil pressure sensor voltage is within the normal operating range of approximately 1-4 volts. When the oil pressure is high, the sensor voltage is high, and the ECM senses a high signal voltage. When the oil pressure is low, the sensor voltage is low, and the ECM senses a low signal voltage. The ECM sends the EOP information to the instrument panel cluster (IPC) via the GMLAN serial data circuit.

Conditions for Running the DTC

•	The engine keeps running.

•	The DTC P0522 runs continuously once the above condition is present for greater than 10 seconds.

Conditions for Setting the DTC

•	The ECM detects that the EOP sensor signal circuit is less than 0.195 volt.

•	The above condition is present for at least 10 seconds.

Action Taken When the DTC Sets

•	The ECM records the operating conditions at the time when the diagnostic test fails. The ECM displays this information in the Failure Records on the scan tool.

•	The IPC illuminates the EOP indicator.

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 ECM receives the clear code command from the scan tool.

Reference Information

Schematic Reference

•	Instrument Cluster Schematics

•	Engine Controls Schematics

Connector End View Reference

•	Component Connector End Views

•	Engine Control Module Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Verification

Ignition OFF, disconnect the harness connector at the fuel oil pressure (EOP) sensor.
Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.

⇒	If less than 4.8 volts, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.

Install a 3 Amp fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify if the scan tool Engine Oil Pressure Sensor parameter is greater than 4.8 volts or 880 kPa (127.6 psi).

⇒	If the parameter is less than 4.8 volts or 880 kPa (127.6 psi), test the signal circuit for a short to ground or an open/high voltage. If the circuit tests normal, replace the ECM.

If all circuits test normal, test or replace the EOP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Engine Oil Pressure Sensor and/or Switch Replacement

•	Control Module References

DTC P0522 4.6L (LH2)