U152A
HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus
U152A is an OBD-II diagnostic trouble code meaning: HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus. Common causes: open circuit lin to damper actuator, short circuit in wiring harness. Estimated repair cost: $17–89.
Symptoms
- Temperature control in the upper left zone does not work
- Lack of response to changes in climate settings
- Uneven airflow in the cabin
- Hot/cold air on one side
- Error indication on the instrument panel
Causes
- Open circuit LIN to damper actuator
- Short circuit in wiring harness
- Damper motor malfunction
- HVAC Module Power Problems
- Corrosion of connector contacts
How to Fix
- Check the continuity of the LIN circuit with a multimeter
- Inspect the condition of connectors and contacts
- Test the damper actuator separately
- Check power and ground of HVAC module
- Scan other modules on the LIN bus
Related codes
FAQ
What does the U152A code mean?
U152A is an OBD-II diagnostic trouble code that indicates: HVAC Control Module Lost Communication With Left Upper Auxiliary Air Temperature Door Actuator On LIN Bus
What causes a U152A error code?
The most common causes of U152A include: Open circuit LIN to damper actuator; Short circuit in wiring harness; Damper motor malfunction; HVAC Module Power Problems.
How do I fix a U152A diagnostic trouble code?
To fix U152A: Check the continuity of the LIN circuit with a multimeter. Inspect the condition of connectors and contacts. Test the damper actuator separately. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U152A?
Yes, but get it checked soon
How much does it cost to fix U152A?
The estimated repair cost for U152A is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat