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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1647 (Engine Control System & Fuel System - 4.8L, 5.3L, 6.0L, 6.2L - DTC P1255 To DTC P3449) >> DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance
APP Sensor 1 5 V Reference P2122 P2138 P2122 P2123 P2138
APP Sensor 2 5 V Reference P2127 P2138 P2127 P2128 P2138
APP Sensor 1 Signal P2122 P2138 P2122 P2123 P2138
APP Sensor 2 Signal P2127 P2138 P2127 P2128 P2138
APP Sensor 1 Low Reference - P2138 P2123 - P2138
APP Sensor 2 Low Reference - P2138 P2128 - P2138