U151C
HVAC Control Module Lost Communication With Auxiliary HVAC Control Module On LIN Bus
U151C is an OBD-II diagnostic trouble code meaning: HVAC Control Module Lost Communication With Auxiliary HVAC Control Module On LIN Bus. Common causes: optional hvac control module malfunction, main hvac control module malfunction. Estimated repair cost: $56–278.
Symptoms
- Auxiliary HVAC not working
- No auxiliary HVAC control
- Error message on the dashboard
- Incorrect operation of the climate control system
- Intermittent HVAC system operation
Causes
- Optional HVAC control module malfunction
- Main HVAC control module malfunction
- Open or short circuit in LIN bus wiring
- Problems with LIN bus connectors
- LIN bus fault
How to Fix
- Check wiring and LIN bus connectors between HVAC modules
- Check power and grounding of HVAC modules
- Check LIN bus resistance
- Replace faulty HVAC control module
- Check and replace if necessary LIN bus wiring
Related codes
FAQ
What does the U151C code mean?
U151C is an OBD-II diagnostic trouble code that indicates: HVAC Control Module Lost Communication With Auxiliary HVAC Control Module On LIN Bus
What causes a U151C error code?
The most common causes of U151C include: Optional HVAC control module malfunction; Main HVAC control module malfunction; Open or short circuit in LIN bus wiring; Problems with LIN bus connectors.
How do I fix a U151C diagnostic trouble code?
To fix U151C: Check wiring and LIN bus connectors between HVAC modules. Check power and grounding of HVAC modules. Check LIN bus resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U151C?
Yes, but get it checked soon
How much does it cost to fix U151C?
The estimated repair cost for U151C is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat