Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.
Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
DTC P0520
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Instrument Cluster Schematics | |||
| 1 | Did you perform the Instrument Cluster Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Instrument Cluster |
| 2 |
|
Go to Step 4 | Go to Step 3 |
| 3 | Test the signal circuit of the oil pressure switch for a short to ground. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 5 |
| 4 | Inspect for poor connections at the harness connector of the engine oil pressure switch. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 7 |
| 6 | Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement
in Engine Mechanical. Did you complete the replacement? |
Go to Step 9 | - |
| 7 |
IMPORTANT:
Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls.Did you complete the replacement? |
Go to Step 9 | - |
| 8 | Replace the instrument panel cluster (IPC). Refer to Instrument Panel Cluster (IPC) Replacement . Did you complete the replacement? |
Go to Step 9 | - |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |