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P2121 Diagnostic Trouble Code Discussion for January 2020

Accelerator Pedal Position Sensor 1 Performance

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Trouble Ticket Help Requests for DTC P2121
Help Request Posted
2004 Dodge Ram 2500 ST 5.9L Hesitation, MIL Lamp on VIN: 3D7KU28CX4
P2121: Apps voltage doesnt agree with idle validation signal. This code will not clear, sets soon as key is turned on. This vehicle has manual trans. Auto trans. Has tps on engine, and has different style connector. Performed sweep test on app1/app2 signals, and signals looked clean, w/ no dropouts. App1 shows 5% at ...
January 02, 2020