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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1640 (Engine Control System & Fuel System - 4.3L - DTC P0340 To DTC P2544) >> 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 and 2010 Chevrolet 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 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 - -