U041F code meaning
Invalid Data Received From Throttle Actuator B Control Module
Network system Generic code U04xx codes Check engine light
What U041F means
U041F addresses throttle actuator B control module, a separately housed driver for a second electronic throttle. Most engines use one throttle driven directly by the engine controller; a separate driver for the first throttle is covered by U0408. The engine controller sets U041F when B's position or status frames arrive but disagree with plausibility checks or carry bad counters. No manufacturer documents U041F publicly, and production engines with such a split are not known. CARB demands rationality monitoring of digital inputs used by emission controls. If throttle data cannot be trusted, the controller limits airflow, often to a fixed limp-home opening. Expect MIL and reduced power. U011E is lost contact, U0308 a software mismatch with a throttle controller.
U041F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U041F
- Check engine light
- Reduced power or limp-home mode
Common causes of U041F
- PossiblePosition feedback of throttle actuator B implausible (sensor or gearbox wear)
- PossibleThrottle actuator B control module internally faulty
- Less likelyConnector or bus wiring fault at module B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Throttle actuator module bCAN bus wiring
What each part of U041F means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1F | The exact fault in that area. |
What to do next
- Note U041F 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 U041F
What does U041F mean?
U041F means "Invalid Data Received From Throttle Actuator B Control Module". U041F addresses throttle actuator B control module, a separately housed driver for a second electronic throttle. It is a generic code, so it means the same on every make.
Is it safe to drive with U041F?
Drive gently and only to a workshop. With U041F the car can go into limp mode (reduced power) to protect itself.
Will U041F fail an emissions test?
Yes, it can. U041F 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 U041F to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U041F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.