U04BB
Invalid Data Received from Switch Input Module B
U04BB is an OBD-II diagnostic trouble code meaning: Invalid Data Received from Switch Input Module B. Common causes: switch module b fault, wiring harness damage. Estimated repair cost: $33–167.
Symptoms
- Incorrect operation of switches in the cabin
- Malfunction indicator light comes on
- Lack of response to pressing some buttons
- Problems with systems managed via module B
Causes
- Switch module B fault
- Wiring harness damage
- Poor contact in connectors
- Software error in the control unit
- Short circuit in the circuit
How to Fix
- Check module connections and connectors
- Test module power and grounding
- Check the integrity of the wires in the harness
- Flash or replace the switch module
- Replace the control unit if necessary
Related codes
Error U04BB by Vehicle Brand
FAQ
What does the U04BB code mean?
U04BB is an OBD-II diagnostic trouble code that indicates: Invalid Data Received from Switch Input Module B
What causes a U04BB error code?
The most common causes of U04BB include: Switch module B fault; Wiring harness damage; Poor contact in connectors; Software error in the control unit.
How do I fix a U04BB diagnostic trouble code?
To fix U04BB: Check module connections and connectors. Test module power and grounding. Check the integrity of the wires in the harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U04BB?
Yes, but get it checked soon
How much does it cost to fix U04BB?
The estimated repair cost for U04BB is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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