Diagnostic Aids
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. 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 P0521 (3.6L LY7)
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views in Engine Controls - 3.6L or Inline Harness Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
880 kPa (127.6 psi) - 8 kPa (1.16 psi) | Go to Diagnostic Aids | Go to Step 3 |
| 3 | Replace the engine oil pressure (EOP) sensor. Refer to Engine Oil Pressure Sensor and/or Switch Replacement
in Engine Mechanical - 3.6L. Did you complete the replacement? |
- | Go to Step 4 | - |
| 4 |
|
- | Go to Step 2 | System OK |