Diagnostic Fault Information
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0521
| Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
| Engine Oil Pressure 5-Volt Reference Circuit |
P0522 |
P0522 |
- |
P0521 |
| Engine Oil Pressure Sensor Signal Circuit |
P0522 |
P0522 |
P0523 |
P0521 |
| Low Reference |
- |
P0523 |
- |
P0521 |