U011E code meaning
Lost Communication With Throttle Actuator B Control Module
Network system Generic code U01xx codes Check engine light
What U011E means
U011E reports that the controller for throttle actuator B has gone silent. Most engines use a single electronic throttle whose motor the engine controller drives itself; a separately housed throttle controller is covered by U0107. SAE reserves B for a second actuator with its own bus-connected driver, but which production engines use one is not documented, and no manufacturer describes U011E publicly. CARB's rule for separate lack-of-communication codes is the formal basis. If control of an electronic throttle is lost, springs return the plate to a fixed limp-home opening that allows only slow driving. Software incompatibility with a throttle controller is U0308, invalid data U0408. Expect MIL, reduced power and possibly an idle-only engine.
U011E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U011E
- MIL on
- Limp-home mode with reduced power
- Poor throttle response or idle only
Common causes of U011E
- Most likelyThrottle B controller without power or ground
- PossibleDamaged CAN wiring or connector to the controller
- Less likelyThrottle actuator B control module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle actuator b moduleCAN bus wiring
What each part of U011E means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1E | The exact fault in that area. |
What to do next
- Note U011E 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 U011E
What does U011E mean?
U011E means "Lost Communication With Throttle Actuator B Control Module". U011E reports that the controller for throttle actuator B has gone silent. It is a generic code, so it means the same on every make.
Is it safe to drive with U011E?
Drive gently and only to a workshop. With U011E the car can go into limp mode (reduced power) to protect itself.
Will U011E fail an emissions test?
Yes, it can. U011E 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 U011E to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will U011E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.