U1186
Lost Communication With Adaptive Cruise Control Module
U1186 is an OBD-II diagnostic trouble code meaning: Lost Communication With Adaptive Cruise Control Module. Common causes: broken or damaged wires in the communication circuit, poor contact in acc module connectors. Estimated repair cost: $167–500.
Symptoms
- Adaptive cruise control does not work
- Check Engine light comes on
- Error message on the instrument panel display
- Disabling the security system (on some models)
Causes
- Broken or damaged wires in the communication circuit
- Poor contact in ACC module connectors
- Malfunction of the adaptive cruise control module
- ACC module power problems
- CAN bus fault
How to Fix
- Check ACC module fuses
- Inspect and check module connectors and wiring
- Check ACC module supply voltage
- Carry out CAN bus diagnostics
- Replace ACC module if necessary
Related codes
FAQ
What does the U1186 code mean?
U1186 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Adaptive Cruise Control Module
What causes a U1186 error code?
The most common causes of U1186 include: Broken or damaged wires in the communication circuit; Poor contact in ACC module connectors; Malfunction of the adaptive cruise control module; ACC module power problems.
How do I fix a U1186 diagnostic trouble code?
To fix U1186: Check ACC module fuses. Inspect and check module connectors and wiring. Check ACC module supply voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1186?
Yes, but get it checked soon
How much does it cost to fix U1186?
The estimated repair cost for U1186 is $167–500. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat