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When I step on the peddle it throttles up slow. When I put it in drive or reverse while stepping on the break it wants to idle up. Throwing 4 codes. P2121 P2122 P0573 P0073.
Vehicle: 2004 dodge 2500 5.9 Cummings.

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P0073 Inlet air temperature sensor voltage too high

P2121 APP voltage does not agree with idle validation signal

P2122 Low voltage at the APP sensor

P0573 High voltage detected at the brake switch

You have 3 problem all are separate from each other , the inlet air temperature sensor this is a disconnection of that sensor harness connection check  for any open on the wire, For P0573 this is a disconnection of the brake pedal switch  check the connection for a open wire, The difficult task is the APP sensor, again if you disconnect that sensor the APP the circuit goes low, check the connection .

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