P0522
P0522-OIL PRESSURE TOO LOWP0552 - Oil Pressure Too Low:
WHEN MONITORED
With the ignition key on and battery voltage above 10.4 volts.
SET CONDITION
The oil pressure sensor voltage at PCM goes below 0.1 of a volt for 0.5 of a second. One Trip Fault. Three good trips to turn off the MIL.
POSSIBLE CAUSES
- (G6) Oil pressure signal circuit open
- (G6) Oil pressure signal circuit shorted to battery voltage
- (G6) Oil pressure signal circuit shorted to ground
- Oil pressure switch
- PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
Diagnostic Test
1. ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read DTCs.
Q: Is the DTC active at this time?
YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
2. OIL PRESSURE SWITCH
Turn the ignition off.
Disconnect the Oil Pressure Switch harness connector.
Ignition on, engine not running.
Connect a jumper wire to the (G6) Oil Pressure Signal circuit in the Sensor harness connector.
With the scan tool monitor the Oil Pressure Switch state.
Touch the other end of the jumper wire to a known good Ground several times.
Q: Did the Oil Pressure Switch state change from High to Low when connecting and disconnecting the jumper wire to ground?
YES: Replace the Oil Pressure Switch. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 3
NOTE: Remove the jumper wire before continuing.
3. (G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the PCM harness connectors.
Ignition on, engine not running.
Measure the voltage on the (G6) Oil Pressure Signal circuit in the Switch harness connector.
Q: Is the voltage above 0 volts?
YES: Repair the short to battery voltage on the (G6) Oil Pressure Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 4
4. (G6) OIL PRESSURE SWITCH SIGNAL CIRCUIT OPEN
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
Measure the resistance of the (G6) Oil Pressure Signal circuit from the Oil Pressure Switch harness connector to the appropriate terminal of special tool #8815.
Q: Is the resistance below 5.0 ohms?
YES: Go To 5
NO: Repair the open in the (G6) Oil Pressure Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
5. (G6) SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between a known good ground and the (G6) Oil Pressure Signal circuit in the Switch connector.
Q: Is the resistance below 100 ohms?
YES: Repair the short to ground in the (G6) Oil Pressure Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Go To 6
6. PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
Q: Were there any problems found?
YES: Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
NO: Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test