• 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

For an overview of the component/system, refer to:Instrument Cluster Description and Operation

Engine Running

• Engine Oil Pressure=The actual value is not within a predetermined range of the calculated value—For greater than 4 s

• Engine Oil Pressure Sensor Circuit=Less than 0.2 V—For greater than 10 s

• Engine Oil Pressure Sensor Circuit=Greater than 4.8 V—For greater than 10 s

• Type C DTC
• Low Engine Oil Pressure Indicator=On

DTCs listed in the DTC Descriptor category=Type C DTC

Instrument Cluster 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 the scan tool parameter:Engine Oil Pressure=0 kPa (0 PSI)
• If not the specified state

  Refer to: Circuit/System Testing

• If the specified state

Note: Record the engine oil pressure observed while performing the Oil Pressure Diagnosis and Testing.

3. Verify the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.Refer to Oil Pressure Diagnosis and Testing in Displays and Gauges Component Replacement Reference
4. Engine Running
5. Verify the scan tool parameter:Engine Oil Pressure (or Engine Oil Pressure Sensor) matches the pressure observed during the Oil Pressure Diagnosis and Testing.
• If not the specified state

  Refer to: Circuit/System Testing

• If the specified state
6. If equipped, verify the engine oil pressure value displayed on the P16 Instrument Clustermatches the Engine Oil Pressure (or Engine Oil Pressure Sensor) scan tool parameter.
• If not the specified state

  Test or replace the component:P16 Instrument Cluster

• If the specified state
7. All OK.

Note: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems » Off
2. Disconnect the electrical connector:B37B Engine Oil Pressure SensororB37D Engine Oil Pressure Sensor - Engine Block
3. Test for less than 10 Ω between the test points:Low Reference circuit terminal 2&Ground
• If 10 Ω or greater
1. Disconnect the electrical connector:K20 Engine Control Module
2. Test for less than 2 Ω between the test points:Low Reference circuit terminal 2@Component harness&The other end of the circuit
• 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 less than 10 Ω
4. Ignition » On / Vehicle » In Service Mode
5. Test for 4.8 to 5.2 V between the test points:5 V Reference circuit terminal 3&Low Reference circuit terminal 2
• If less than 4.8 V
1. Ignition/Vehicle » Off
2. Disconnect the electrical connector:K20 Engine Control Module
3. Test for infinite resistance between the test points:5 V Reference circuit terminal 3@Component harness&Ground
• If less than infinite resistance » Repair the short to ground on the circuit.
• If infinite resistance
4. Test for less than 2 Ω between the test points:5 V Reference circuit terminal 3@Component harness&The other end of the circuit
• 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 greater than 5.2 V
1. Ignition/Vehicle » Off
2. Disconnect the electrical connector:K20 Engine Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points:5 V Reference circuit terminal 3@Component harness&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 between 4.8 and 5.2 V
6. Verify the scan tool parameter:Engine Oil Pressure (or Engine Oil Pressure Sensor) =0 kPa (0 PSI)
• If greater than 0 kPa (0 PSI)
1. Ignition/Vehicle » Off
2. Disconnect the electrical connector:K20 Engine Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points:Signal circuit terminal 1@Component harness&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 0 kPa (0 PSI) or less
7. Connect a 3 A fused jumper wire between the test points:Signal circuit terminal 1&5 V Reference circuit terminal 3
8. Verify the scan tool parameter:Engine Oil Pressure=Greater than 800 kPa (116 PSI)
• If 800 kPa (116 PSI) or less
1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
2. Disconnect the electrical connector:K20 Engine Control Module
3. Test for infinite resistance between the test points:Signal circuit terminal 1@Component harness&Ground
• If less than infinite resistance » Repair the short to ground on the circuit.
• If infinite resistance
4. Test for less than 2 Ω between the test points:Signal circuit terminal 1@Component harness&The other end of the circuit
• 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 greater than 800 kPa (116 PSI)
9. Test or replace the component:B37B Engine Oil Pressure SensororB37D Engine Oil Pressure Sensor - Engine Block

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

• Displays and Gauges Component Replacement Reference
• For control module replacement, programming, and setup refer to:Control Module References