U041FInvalid Data Received From Throttle Actuator B Control 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
- 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.
- What you may notice
- Check engine light
- Reduced power or limp-home mode
- Likely causes
- PossiblePosition feedback of throttle actuator B implausible (sensor or gearbox wear)
- PossibleThrottle actuator B control module internally faulty
- RareConnector or bus wiring fault at module B
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.