Circuit Description
The engine oil pressure switch closes (signal circuit is low) with low oil pressure and opens (signal circuit is high) with oil pressure above 4.5 psi. The PCM monitors the oil pressure switch signal circuit and sends a class 2 message to the body control module (BCM) indicating the switch status. The BCM sends a message via the class 2 serial data circuit to the IPC in order to illuminate the low oil pressure indicator.
Conditions for Running the DTC
| • | DTCs P0117, P0118, P1111 and P1114 are not set. |
| • | The ignition is ON, with the engine OFF. |
| • | The engine temperature is 10°C (50°F) less than the last key off temperature. |
Conditions for Setting the DTC
| • | The PCM detects that the oil pressure switch signal circuit is high. |
| • | The above conditions are present for greater than 10 seconds. |
Action Taken When the DTC Sets
The PCM stores the conditions that are present when the DTC sets as Failure Records data only. This information is not stored as Freeze Frame data.
Conditions for Clearing the DTC
| • | The DTC becomes history when then conditions for setting the DTC are no longer present. |
| • | The history DTC clears after 40 malfunction free warm-up cycles. |
| • | The PCM receives the clear code command from the scan tool. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Instrument Cluster Schematics | |||
1 | Did you perform the Instrument Cluster Diagnostic System Check? | Go to Step 2 | |
2 |
Does the Engine Oil Pressure Switch parameter display Low? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the Engine Oil Pressure Switch parameter display Low? | Go to Step 5 | Go to Step 4 |
4 | Test the signal circuit of the engine oil pressure switch for an open, a high resistance, or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 7 |
5 | Test the case ground of the engine oil pressure switch for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the engine oil pressure switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
8 | Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor or Switch Replacement . Did you complete the replacement? | Go to Step 10 | -- |
9 |
Important: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 2.4L or Powertrain Control Module Replacement in Engine Controls - 3.4L. Did you complete the replacement? | Go to Step 10 | -- |
10 |
Does the DTC reset? | Go to Step 2 | System OK |
