Diagnostic Fault Information
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138
| Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
| APP Sensor 1 Signal | P2122 | P2138 | P2122 | P2123 | P2120, P2135 |
| APP Sensor 1 5-Volt Reference | P0335, P0651, P2122, P2135 | P2138 | P2122 | P2123, P2135, P0651 | P2120, P2135 |
| APP Sensor 1 Low Reference | - | P2138 | P2123 | - | P2120, P2135 |
| APP Sensor 2 Signal | P2127 | P2138 | P2127 | P2128 | P2120, P2135 |
| APP Sensor 2 5-Volt Reference | P0452, P0532, P0641, P2127, P2135 | P2138 | P2127 | P2128, P0641 | P2120, P2135 |
| APP Sensor 2 Low Reference | - | P2138 | P2128 | - | P2120, P2135 |