Diagnostic Fault Information
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Perform the DIAGNOSTIC SYSTEM CHECK - VEHICLE prior to using this diagnostic procedure.
DTC P0412 or P0418
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Pressure Sensor 5-Volt Reference Voltage | P2432 | P2431 | P2431 | P2430, P2431 |
| Pressure Sensor Signal | P2432 | P2432 | P2433 | P2430, P2431 |
| Pressure Sensor Low Reference | - | P2433 | - | - |
| Pump Voltage Supply | P0411 | P0411 | 2444 | - |
| Pump Ground | - | P0411 | - | - |
| Solenoid Voltage Supply | P0411 | P0411 | P2440 | - |
| Solenoid Ground | - | P0411 | - | - |
| Pump Relay Coil Voltage Supply | P0411, P0418 | P0411, P0418 | - | - |
| Pump Relay Coil Control | P0418, P2444 | P0411, P0418 | P0418 | - |
| Pump Relay Switch Supply | P0411 | P0411 | - | - |
| Solenoid Relay Coil Voltage Supply | P0411, P0412 | P0411, P0412 | - | - |
| Solenoid Relay Coil Control | P0412, P2440 | P0411, P0412 | P0412 | - |
| Solenoid Relay Switch Supply | P0411 | P0411 | - | - |