• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

The engine oil pressure control solenoid valve is used to control engine oil pressure inside the mechanical engine oil pump.The control module controls the commanded state of the solenoid valve based on the following inputs:

• Engine Speed
• Calculated Engine Oil Temperature
• Engine Oil Pressure
• Engine Run Time

When the solenoid valve is commanded Off, oil pressure is higher.When the solenoid valve is commanded On, oil pressure is lower.

• Engine=Running
• Ignition Voltage=Greater than 11 V

Frequency the DTC runs=Continuously-After the running conditions are met

• DTC P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0117, P0118, P0119, P0128, P0335, P0336, P0521, P0522, P0523, P06DA, P06DB, P06DC, P06DD, P06DE, P111E, P2227, P2228, P2229, P2230 = Not set
• Engine Speed=1,500 to 2,500 RPM

Frequency the DTC runs=Continuously-After the running conditions are met

• DTC P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0117, P0118, P0119, P0128, P0335, P0336, P0521, P0522, P0523, P06DA, P06DB, P06DC, P06DD, P06DE, P111E, P2227, P2228, P2229, P2230 = Not set
• Engine=Running—For greater than 10 s
• Engine Speed=1,500 to 2,500 RPM
• Engine Oil Pressure Control Solenoid Valve=On—For greater than 10 s

Frequency the DTC runs=Continuously-After the running conditions are met

Control Circuit=Commanded state does not match the actual state—For greater than 1 s

Engine Oil Pressure=Greater than a predefined threshold

Engine Oil Pressure=Less than a predefined threshold

• DTCs listed in the DTC Descriptor category=Type B DTC
• Engine Oil Pressure Control Solenoid Valve=Off
• Reduced Engine Power=Active

• DTCs listed in the DTC Descriptor category=Type B DTC

Engine Mechanical Schematics

Master Electrical Component List

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Control Module References

1. Ignition » On / Vehicle » In Service Mode
2. Verify there are no DTCs set related to the following component/system:
• B35B Engine Oil Level Sensor
• B37 Engine Oil Pressure Switch
• B37B Engine Oil Pressure Sensor
• If other DTCs are set

  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• If no other DTCs are set
3. Verify the condition does not exist:Engine Oil—Contaminated/Dirty/Fill Level=Low
• If a condition exists

  Repair as necessary

• If no condition exists
4. Perform the scan tool control function:Engine Oil Pressure Control Solenoid Valve»Low Pressure»High Pressure

   Verify the scan tool parameter:

• Engine Oil Pressure Control Solenoid Valve Control Circuit High Voltage Test Status=Not RunorOK
• Engine Oil Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status=Not RunorOK
• Engine Oil Pressure Control Solenoid Valve Control Circuit Open Test Status=Not RunorOK
• If not the specified state

  Refer to: Circuit/System Testing

• If the specified state
5. Engine»Running@1,800 to 2,000 RPM

Note: Using the scan tool line graph function may make it easier to identify if the value changes.

6. Perform the scan tool control function:Engine Oil Pressure Control Solenoid Valve»Low Pressure

Verify the scan tool parameter:Engine Oil Pressure=Change is greater than 30 kPa (4 PSI)

7. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

   Verify the DTC does not set.

• If the DTC sets

  Refer to: Circuit/System Testing

• If the DTC is not set
8. All OK.

1. Ignition/Vehicle & All vehicle systems » Off

Note:

• The component is not accessible without disassembling the engine, so testing will begin at an inline harness connector.
• Use the schematic to determine which inline harness connector must be disconnected for the following component:Q44 Engine Oil Pressure Control Solenoid Valve

2. Disconnect the appropriate electrical connector:Inline Harness Connector
3. Ignition » On / Vehicle » In Service Mode

Note: Testing for steps 4 to 12 is performed on the control module K20 side of the harness connector.

4. Verify a test lamp turns On between the test points:Ignition circuit terminal&Ground
• If the test lamp does not turn On and the circuit fuse is OK
1. Ignition/Vehicle » Off & Remove » Test lamp
2. Test for less than 2 Ω between the test points:Ignition circuit terminal@Inline Harness Connector&Output terminal@Fuse
• If 2 Ω or greater » Repair the open/high resistance in the circuit.
• If less than 2 Ω » Verify the fuse is OK and there is voltage at the fuse.
• If the test lamp does not turn On and the circuit fuse is open
1. Ignition/Vehicle » Off & Remove » Test lamp

Note: The ignition circuit supplies voltage to other components. Test all circuits for a short to ground or test all components for being shorted.

2. Test for infinite resistance between the test points:Ignition circuit terminal@Inline Harness Connector&Ground
• If less than infinite resistance » Repair the short to ground on the circuit.
• If infinite resistance»Refer to step 13
• If the test lamp turns On
5. Verify a test lamp does not turn On between the test points:Control circuit terminal&B+
• If the test lamp turns On
1. Ignition/Vehicle » Off & Remove » Test lamp
2. Disconnect the appropriate electrical connector:K20 Engine Control Module
3. Test for infinite resistance between the test points:Control circuit terminal@Inline Harness Connector&Ground
• If less than infinite resistance » Repair the short to ground on the circuit.
• If infinite resistance » Replace the component:K20 Engine Control Module
• If the test lamp does not turn On
6. Remove » Test Lamp

Warning: Avoid contact with moving parts and hot surfaces while working around a running engine in order to prevent physical injury.

7. Engine » Idling
8. Perform the scan tool control function:Engine Oil Pressure Control Solenoid Valve»Low Pressure

   Verify the scan tool parameter:Engine Oil Pressure Control Solenoid Valve Control Circuit High Voltage Test Status=Not RunorOK

• If not the specified state
1. Ignition/Vehicle » Off
2. Disconnect the appropriate electrical connector:K20 Engine Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points:Control circuit terminal@Inline Harness Connector&Ground
• If 1 V or greater » Repair the short to voltage on the circuit.
• If less than 1 V » Replace the component:K20 Engine Control Module
• If the specified state
9. Ignition/Vehicle » Off
10. Connect a 3 A fused jumper wire between the test points:Control circuit terminal&Ignition circuit terminal
11. Ignition » On / Vehicle » In Service Mode
12. Verify the scan tool parameter:Engine Oil Pressure Control Solenoid Valve Control Circuit Open Test Status=Not RunorOK
• If not the specified state
1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
2. Disconnect the appropriate electrical connector:K20 Engine Control Module
3. Test for less than 2 Ω between the test points:Control circuit terminal@Inline Harness Connector&The other end of the circuit@Control module harness
• If 2 Ω or greater » Repair the open/high resistance in the circuit.
• If less than 2 Ω » Replace the component:K20 Engine Control Module
• If the specified state
13. Ignition/Vehicle & All vehicle systems » Off

Note: Testing for steps 14 to 16 is performed on the component side of the harness connector.

14. Test for 10 to 30 Ω between the test points:Ignition circuit terminal&Control circuit terminal@Inline Harness Connector
• If not between 10 and 30 Ω
1. Perform the following procedure/test:Component Testing—Static Test

   Verify the procedure/test passes.

• If the procedure/test does not pass»Replace the component:Q44 Engine Oil Pressure Control Solenoid Valve
• If the procedure/test passes
2. Repair the open/high resistance in the circuit:Control CircuitorIgnition circuit
• If between 10 and 30 Ω
15. Test for infinite resistance between the test points:
• Control circuit terminal@Inline Harness Connector&Ground
• Ignition circuit terminal@Inline Harness Connector&Ground
• If less than infinite resistance

  Repair short to ground on the circuit.

• If infinite resistance
16. Test for infinite resistance between the test points:
• Control circuit terminal@Inline Harness Connector&Each terminal of the harness connector
• Ignition circuit terminal@Inline Harness Connector&Each terminal of the harness connector
• If less than infinite resistance

  Repair the short between the circuits.

• If infinite resistance
17. Test or replace the component:Q44 Engine Oil Pressure Control Solenoid Valve

1. Ignition/Vehicle » Off
2. Disconnect the electrical connector:Q44 Engine Oil Pressure Control Solenoid Valve
3. Test for 10 to 30 Ω between the test points:Control terminal 2/B&Ignition terminal 1/A
• If not between 10 and 30 Ω

  Replace the component:Q44 Engine Oil Pressure Control Solenoid Valve

• If between 10 and 30 Ω
4. Test for infinite resistance between the test points:Each terminal of the component&The component's housing
• If less than infinite resistance

  Replace the component:Q44 Engine Oil Pressure Control Solenoid Valve

• If infinite resistance
5. All OK.

1. Ignition/Vehicle » Off
2. Disconnect the electrical connector:Q44 Engine Oil Pressure Control Solenoid Valve
3. Connect a 3 A fused jumper wire between the test points:Ignition terminal 1/A&12 V

Caution: Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

4. Momentarily connect a jumper wire between the test points:Control terminal 2/B&Ground

Verify the component turns On and Off when connecting and disconnecting the jumper wire:Q44 Engine Oil Pressure Control Solenoid Valve

• If the component does not turn On and Off

  Replace the component:Q44 Engine Oil Pressure Control Solenoid Valve

• If the component turns On and Off
5. All OK.

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

• Oil Pump Flow Control Solenoid Valve Replacement—Q44 Engine Oil Pressure Control Solenoid Valve
• For control module replacement, programming, and setup refer to:Control Module References