Diagnostic Fault Information
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Always perform the Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
DTC P0641 or P0651
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Accelerator Pedal Position (APP) Sensor 2 5-Volt Reference A Circuit | P0641 | P2127 | P0641 | - |
| Accelerator Pedal Position (APP) Sensor 1 5-Volt Reference B Circuit | P0651 | P2122 | P0651 | - |
| Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference A Circuit | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | P0532 | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | - |
| Fuel Tank Pressure (FTP) Sensor 5-Volt Reference A Circuit | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | P0452 | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | - |
| Manifold Absolute Pressure (MAP) Sensor 5-Volt Reference A Circuit | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | P0107 | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | - |
| Throttle Position (TP) Sensor 1 and 2 5-Volt Reference B Circuit | P0651 | P0122, P0222 | P0651 | - |
| Engine Oil Pressure (EOP) Switch 5-Volt Reference A Circuit | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | P0580 | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | - |
| Crankshaft Position (CKP) Sensor 5-Volt Reference B Circuit | P0651 | P0335 | P0641, P2135 | - |
| Camshaft Position (CMP) Sensor 5-Volt Reference A Circuit | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | P0340, P0341 | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | - |
| Clutch Pedal Position (CPP) Sensor 5-Volt Reference A Circuit | P0107, P0641, P0522, P0452, P0532, P0802 (manual trans only) | P0802 | P0107, P0641, P0522, P0452, P0533 (manual trans only) | P0806, P080A |