Network, generic

U041F Invalid Data Received From Throttle Actuator B Control Module

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Position feedback of throttle actuator B implausible (sensor or gearbox wear)
Throttle actuator B control module internally faulty
Connector or bus wiring fault at module B

Symptoms

  • Check engine light
  • Reduced power or limp-home mode

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,200
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

throttle actuator module bcan bus wiring

Related codes

U011EU0408U0308U0107

References: law.cornell.edu, en.wikipedia.org.