U18CA
Lost Communication With Active Safety Control Module 1 On Flexray Bus
U18CA is an OBD-II diagnostic trouble code meaning: Lost Communication With Active Safety Control Module 1 On Flexray Bus. Common causes: broken or damaged flexray bus wires, short circuit in communication circuit. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Active safety systems do not work (ABS, ESP, etc.)
- Additional errors related to security systems appear
- Possible problems starting the engine
- The system may go into emergency mode
Causes
- Broken or damaged Flexray bus wires
- Short circuit in communication circuit
- Active safety module malfunction
- Module power problems
- Corrosion or oxidation of contacts
How to Fix
- Check integrity of Flexray bus wiring
- Check the supply voltage of the active safety module
- Inspect all connectors for corrosion or damage.
- Conduct computer diagnostics to identify a specific malfunction
- Repair only from an authorized dealer
Related codes
FAQ
What does the U18CA code mean?
U18CA is an OBD-II diagnostic trouble code that indicates: Lost Communication With Active Safety Control Module 1 On Flexray Bus
What causes a U18CA error code?
The most common causes of U18CA include: Broken or damaged Flexray bus wires; Short circuit in communication circuit; Active safety module malfunction; Module power problems.
How do I fix a U18CA diagnostic trouble code?
To fix U18CA: Check integrity of Flexray bus wiring. Check the supply voltage of the active safety module. Inspect all connectors for corrosion or damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18CA?
Do not drive — repair immediately
How much does it cost to fix U18CA?
The estimated repair cost for U18CA is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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