Cummins ISX CM870 (2003-06) Fault Code: 432 PID: S230 SPN: 558 FMI: 13/13 Accelerator Pedal Idle Validation Circuit – out of calibration. Voltage at idle validation on-idle and off-idle circuit does not match accelerator pedal position.
This fault is logged when both the on idle and off idle validation switches disagree with the accelerator pedal position signal. Turning the keyswitch ON while partially depressing the accelerator pedal can cause this fault code to go active. This fault will stay active until the pedal is cycled through its full travel.
Possible repairs:
1)Replace the accelerator pedal assembly.
2)Replace the OEM harness.
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