U043D code meaning
Invalid Data Received From Accelerator Pedal Module
Network system Generic code U04xx codes Check engine light
What U043D means
U043D applies where the accelerator pedal is a networked module that sends pedal position as messages instead of two analogue voltages. The engine or vehicle controller stores it when those messages carry an implausible position, redundant values that disagree or a broken counter. No manufacturer documents U043D publicly; in the systems that are documented the pedal stays hard-wired, for instance in the BMW i4, whose bulletin B610625 blames implausible pedal sensor signals on poor pins at the CCU connector and logs them under a BMW-specific code. CARB requires rationality checks of inputs used by emission-related controls, and electronic throttle systems drop to idle or limited torque when the driver demand cannot be trusted. Expect reduced power and a warning lamp. U013C is lost contact.
U043D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U043D
- Reduced power or limp-home mode
- Engine or drivetrain warning lamp on
- Pedal response delayed or ignored
Common causes of U043D
- PossiblePoor pin contact at the pedal module or its receiver connector
- PossibleInternal fault of the accelerator pedal module
- Less likelyPedal module and engine controller software not matched
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Accelerator pedal module
What each part of U043D means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3D | The exact fault in that area. |
What to do next
- Note U043D 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 U043D
What does U043D mean?
U043D means "Invalid Data Received From Accelerator Pedal Module". U043D applies where the accelerator pedal is a networked module that sends pedal position as messages instead of two analogue voltages. It is a generic code, so it means the same on every make.
Is it safe to drive with U043D?
Drive gently and only to a workshop. With U043D the car can go into limp mode (reduced power) to protect itself.
Will U043D fail an emissions test?
Yes, it can. U043D 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 U043D to fix?
Difficulty: medium. A typical repair takes 0.3 to 1.5 hours of work. This is a job for a workshop.
Will U043D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.