Diagnostic Fault Information
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0443 or P0449
| Circuit |
Short to Ground |
High Resistance |
Open |
Short to Voltage |
| Ignition 1 Voltage - Purge Supply |
P0443 |
P0443 |
P0443 |
- |
| Battery Positive - Vent Supply |
P0449 |
P0449 |
P0449 |
- |
| EVAP Purge Solenoid Control |
P0443 |
P0443 |
P0443 |
P0443 |
| EVAP Vent Solenoid Control |
P0449 |
P0449 |
P0449 |
P0449 |