U013CLost Communication With Accelerator Pedal Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- U013C applies to an accelerator pedal module that reports over a data bus instead of analog sensor lines. In a drive-by-wire system the pedal module carries the driver's torque request to the engine or drive controller, so that controller has to fall back to a safe state as soon as the pedal messages disappear. No manufacturer documents U013C publicly; most pedals still use two analog tracks, whose faults appear as circuit codes such as P2122 or P2127 instead. CARB requires lack of communication from a digital input to be detected separately and stored as its own fault code. U043D covers implausible pedal data. Expect reduced power or idle only, a warning lamp and, depending on the manufacturer, the MIL.
- What you may notice
- No response to the accelerator, engine stays at idle
- Reduced power warning
- MIL on depending on the manufacturer
- Likely causes
- LikelyLoose or corroded connector at the pedal module (footwell moisture)
- PossibleSupply, ground or bus wiring of the pedal module faulty
- RareAccelerator pedal module internally faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.