OBD-II code · Network
U0443 Invalid Data Received From Body Control Module B
A receiving module detected implausible data from body control module B. BCM-relayed signals (door/lock/lighting state, ignition, theft) fail plausibility checks and are rejected.
Is it safe to drive with U0443?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Body Control Module B
Related codes
- U0444Invalid Data Received From Body Control Module C
- U0445Invalid Data Received From Body Control Module D
- U0446Invalid Data Received From Body Control Module E
- U0440Invalid Data Received from Drive Motor Control Module
- U0441Invalid Data Received From Emissions Critical Control Information
- U0442Invalid Data Received From ECM/PCM B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.