U18BB
Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus
U18BB is an OBD-II diagnostic trouble code meaning: Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus. Common causes: broken or damaged can bus wires, power steering control module malfunction. Estimated repair cost: $56–278.
Symptoms
- Increased effort when turning the steering wheel
- The power steering fault indicator on the dashboard is on
- Loss of parking assistance functions
- Unstable operation of the power steering system
- Other related systems may show errors
Causes
- Broken or damaged CAN bus wires
- Power steering control module malfunction
- Problems with power steering module
- Corrosion or poor contact in connectors
- Malfunction of other modules in the CAN network
How to Fix
- Check the integrity of the CAN bus wiring
- Check power steering module power supply and ground
- Inspect the power steering module connectors for corrosion
- Scan other modules for errors
- If necessary, replace the power steering control module
Related codes
FAQ
What does the U18BB code mean?
U18BB is an OBD-II diagnostic trouble code that indicates: Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus
What causes a U18BB error code?
The most common causes of U18BB include: Broken or damaged CAN bus wires; Power steering control module malfunction; Problems with power steering module; Corrosion or poor contact in connectors.
How do I fix a U18BB diagnostic trouble code?
To fix U18BB: Check the integrity of the CAN bus wiring. Check power steering module power supply and ground. Inspect the power steering module connectors for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18BB?
Limited driving only, diagnose soon
How much does it cost to fix U18BB?
The estimated repair cost for U18BB is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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