U04BC
Invalid Data Received From Switch Input Module C
A receiving module detected implausible data from switch input module C (multiplexed switch reader for steering/console buttons). Button state values fail plausibility checks and are rejected.
A receiving module detected implausible data from switch input module C (multiplexed switch reader for steering/console buttons). Button state values fail plausibility checks and are rejected.
Common causes
- high
Module internal fault or sensor input drift
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-660
- medium
Software version mismatch after replacement
A plausible cause — test and verify before replacing parts.
Typical part cost: $90-660
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for U04BC.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for U04BC.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for U04BC.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does U04BC mean?
U04BC means "Invalid Data Received From Switch Input Module C". It is a generic OBD-II code that points to a fault in the network / communication.
What are the most common causes of U04BC?
module internal fault or sensor input drift; software version mismatch after replacement; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full U04BC diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.