Network, generic

U043D Invalid Data Received From Accelerator Pedal Module

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

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.

Likely causes

Poor pin contact at the pedal module or its receiver connector

Internal fault of the accelerator pedal module

Pedal module and engine controller software not matched

Symptoms

Reduced power or limp-home mode
Engine or drivetrain warning lamp on
Pedal response delayed or ignored

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€50–450

Time0.3–1.5 h

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

Parts involved

accelerator pedal module

Related codes

U013C P2138 P2122

References: law.cornell.edu, static.nhtsa.gov, en.wikipedia.org.