Code P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage came up today. I searched around for what others have talked about and didn't find any answers. Anyone else know anything about this?
2006 with 131,000

 

Try this for P2123

The harness may chaff in the area of the Canister Purge Solenoid attachment bracket, causing an intermittent shorting to ground. The harness routing forces the harness into the edge of the bracket. This bracket is present with any Ecotec engine. The Purge Solenoid bracket may have a sharp edge from the manufacturing/shearing operation. If any DTCs are setting consistently, perform the eSI diagnostics and repair as necessary. If the eSI diagnostics do not isolate the concern, inspect the engine harness for potential shorts to ground at the EVAP purge valve bracket on the side of the cylinder head. Then repair and reposition the circuits/harness as necessary.

Note: To prevent future chaffing remove the sharp edge from the purge solenoid bracket and add conduit to the engine harness at the ECM and Purge Solenoid harness breakout.