U1152
Lost Communications With HVAC Control Module
U1152 is an OBD-II diagnostic trouble code meaning: Lost Communications With HVAC Control Module . Common causes: open or short circuit in hvac module communication circuit, climate control module malfunction. Estimated repair cost: $56–278.
Symptoms
- Climate control does not work
- There is no indication on the climate control display
- Heater fan does not turn on
- The temperature in the cabin is not regulated
- Hot or cold air is supplied without adjustment
Causes
- Open or short circuit in HVAC module communication circuit
- Climate control module malfunction
- HVAC Module Power Problems
- Bad contacts in connectors
- Damage to the CAN bus
How to Fix
- Check fuses associated with the climate control system
- Inspect the HVAC module wiring harness and connectors
- Check the power and ground of the climate control module
- Scan other modules for communication errors
- Replace HVAC control module if necessary
Related codes
FAQ
What does the U1152 code mean?
U1152 is an OBD-II diagnostic trouble code that indicates: Lost Communications With HVAC Control Module
What causes a U1152 error code?
The most common causes of U1152 include: Open or short circuit in HVAC module communication circuit; Climate control module malfunction; HVAC Module Power Problems; Bad contacts in connectors.
How do I fix a U1152 diagnostic trouble code?
To fix U1152: Check fuses associated with the climate control system. Inspect the HVAC module wiring harness and connectors. Check the power and ground of the climate control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1152?
Yes, but get it checked soon
How much does it cost to fix U1152?
The estimated repair cost for U1152 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat