Diagnostic Fault Information
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Battery Voltage - Relay Switch | * | ** | - | - |
| Fuel Pump Supply Voltage | * | ** | *** | - |
| Fuel Pump Relay Control | P0628 | P0627 | P0629 | - |
| Fuel Pump Ground | - | P0627 | - | - |
| * The fuel pump fuse opens and the engine cranks but does not run. ** The engine cranks but does not run. *** The fuel pump operates continuously and the battery will discharge. |
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