U013C code meaning
Lost Communication With Accelerator Pedal Module
Network system Generic code U01xx codes Check engine light
What U013C means
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.
U013C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U013C
- No response to the accelerator, engine stays at idle
- Reduced power warning
- MIL on depending on the manufacturer
Common causes of U013C
- Most likelyLoose or corroded connector at the pedal module (footwell moisture)
- PossibleSupply, ground or bus wiring of the pedal module faulty
- Less likelyAccelerator pedal module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Accelerator pedal moduleCAN bus wiring
What each part of U013C means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3C | The exact fault in that area. |
What to do next
- Note U013C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U013C
What does U013C mean?
U013C means "Lost Communication With Accelerator Pedal Module". U013C applies to an accelerator pedal module that reports over a data bus instead of analog sensor lines. It is a generic code, so it means the same on every make.
Is it safe to drive with U013C?
Drive gently and only to a workshop. With U013C the car can go into limp mode (reduced power) to protect itself.
Will U013C fail an emissions test?
Yes, it can. U013C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U013C to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U013C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.