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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (ENGINE CONTROLS - 6.6L - DIAGNOSIS (DTCs P0402-P2636)) >> DTC P2122, P2123, P2127, P2128, or P2138 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
DTC P2122, P2123, P2127, P2128, or P2138

Circuit Short to Ground High Resistance Open Short to Voltage
APP Sensor 1 Signal P2122 P2138 P2122 P2123
APP Sensor 1 5-Volt Reference P2122, P0698 P2138 P2122 P2123, P0699
APP Sensor 1 Low Reference - P2138 P2123 -
APP Sensor 2 Signal P2127 P2138 P2127 P2128
APP Sensor 2 5-Volt Reference P2127, P0652 P2138 P2127 P2128, P0653
APP Sensor 2 Low Reference - P2138 P2128 -