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 P2120, P2122, P2123, P2125, P2127, P2128 or P2138
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| APP Sensor 1 Signal | P2122 | P2122 | P2123 | - |
| APP Sensor 1 5-Volt Reference | P0651 | P2122 | P0651 | - |
| APP Sensor 1 Low Reference | - | P2123 | - | - |
| APP Sensor 2 Signal | P2127 | P2127 | P2128 | - |
| APP Sensor 2 5-Volt Reference | P0641, P0452, P0532, P0522 | P2127 | P0641, P0108, P0533, P0522 | - |
| APP Sensor 2 Low Reference | - | P2128 | - | - |