U18CF
Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
U18CF is an OBD-II diagnostic trouble code meaning: Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus. Common causes: open or short circuit in the can bus, active safety module malfunction. Estimated repair cost: $56–222.
Symptoms
- Check Engine Light Is On
- Disabling active safety systems
- Errors in other CAN bus-related systems
- Problems with ABS/ESP operation
- Reduced functionality of driving assistants
Causes
- Open or short circuit in the CAN bus
- Active safety module malfunction
- Module power problems
- Corrosion or oxidation of contacts
- Software error in the module
How to Fix
- Check the integrity of the CAN bus and contacts
- Diagnose the active safety module
- Check power supply and grounding of the module
- Update the module firmware if necessary
- Repair only from an authorized dealer
Related codes
FAQ
What does the U18CF code mean?
U18CF is an OBD-II diagnostic trouble code that indicates: Lost Communication With Active Safety Control Module 1 On High Speed CAN Bus
What causes a U18CF error code?
The most common causes of U18CF include: Open or short circuit in the CAN bus; Active safety module malfunction; Module power problems; Corrosion or oxidation of contacts.
How do I fix a U18CF diagnostic trouble code?
To fix U18CF: Check the integrity of the CAN bus and contacts. Diagnose the active safety module. Check power supply and grounding of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18CF?
Do not drive — repair immediately
How much does it cost to fix U18CF?
The estimated repair cost for U18CF is $56–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat