Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. 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 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 | - |
| APP Sensor 1 5-Volt Reference | P2122 | P2138 | P2122 | P2123 | - |
| APP Sensor 1 Low Reference | - | P2138 | P2123 | - | - |
| APP Sensor 2 Signal | P2127 | P2138 | P2127 | P2128 | - |
| APP Sensor 2 5-Volt Reference | P2127 | P2138 | P2127 | P2128 | - |
| APP Sensor 2 Low Reference | - | P2138 | P2128 | - | - |