U02B3
Lost Communication With Driver Monitoring System Module
U02B3 is an OBD-II diagnostic trouble code meaning: Lost Communication With Driver Monitoring System Module. Common causes: open or short circuit in the module power supply circuit, damaged wiring harness or connectors. Estimated repair cost: $56–278.
Symptoms
- Disabling the driver monitoring system
- Error message on the dashboard
- Related security features don't work
- May be accompanied by other fault codes
Causes
- Open or short circuit in the module power supply circuit
- Damaged wiring harness or connectors
- Driver monitoring module malfunction
- Problems with ECU software
- Blown circuit fuse
How to Fix
- Check the fuses of the relevant circuits
- Inspect the wiring harness and connectors for damage.
- Check the power and ground of the monitoring module
- Scan the module for additional error codes
- If necessary, replace the driver monitoring module
- Repair only from an authorized dealer
Related codes
Error U02B3 by Vehicle Brand
FAQ
What does the U02B3 code mean?
U02B3 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Driver Monitoring System Module
What causes a U02B3 error code?
The most common causes of U02B3 include: Open or short circuit in the module power supply circuit; Damaged wiring harness or connectors; Driver monitoring module malfunction; Problems with ECU software.
How do I fix a U02B3 diagnostic trouble code?
To fix U02B3: Check the fuses of the relevant circuits. Inspect the wiring harness and connectors for damage.. Check the power and ground of the monitoring module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U02B3?
Do not drive — repair immediately
How much does it cost to fix U02B3?
The estimated repair cost for U02B3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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