U18B6
Lost Communication With Active Safety Control Module 1 On Chassis Expansion CAN Bus
U18B6 is an OBD-II diagnostic trouble code meaning: Lost Communication With Active Safety Control Module 1 On Chassis Expansion CAN Bus. Common causes: broken or damaged can bus wires, corrosion or poor contact in connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Security error message on instrument panel
- Disabling active safety systems
- Possible problems with ABS/ESP operation
- Errors in other related systems
Causes
- Broken or damaged CAN bus wires
- Corrosion or poor contact in connectors
- Active safety module malfunction
- Module power problems
- Software failures in the module
How to Fix
- Check the integrity of the CAN bus wiring harness
- Inspect and clean the electrical connectors of the module
- Check fuses and module power supply
- Diagnose the active safety module
- Repair only from an authorized dealer
Related codes
FAQ
What does the U18B6 code mean?
U18B6 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Active Safety Control Module 1 On Chassis Expansion CAN Bus
What causes a U18B6 error code?
The most common causes of U18B6 include: Broken or damaged CAN bus wires; Corrosion or poor contact in connectors; Active safety module malfunction; Module power problems.
How do I fix a U18B6 diagnostic trouble code?
To fix U18B6: Check the integrity of the CAN bus wiring harness. Inspect and clean the electrical connectors of the module. Check fuses and module power supply. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18B6?
Do not drive — repair immediately
How much does it cost to fix U18B6?
The estimated repair cost for U18B6 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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