U1509
HVAC Controls Info Display Module Lost Communication With HVAC Control Module On LIN Bus
U1509 is an OBD-II diagnostic trouble code meaning: HVAC Controls Info Display Module Lost Communication With HVAC Control Module On LIN Bus. Common causes: open or short circuit in the lin bus circuit, climate control module malfunction. Estimated repair cost: $56–167.
Symptoms
- Climate control does not work or does not work correctly
- Information display does not show climate control information
- The climate control system does not respond to commands
- A warning light may come on on the dashboard
Causes
- Open or short circuit in the LIN bus circuit
- Climate control module malfunction
- Information display malfunction
- Poor contact in connectors
- Problems with module software
How to Fix
- Check the integrity of the LIN bus wiring
- Inspect connectors for oxidation or damage
- Check power and ground of modules
- Scan modules for errors
- If necessary, replace the faulty module
Related codes
FAQ
What does the U1509 code mean?
U1509 is an OBD-II diagnostic trouble code that indicates: HVAC Controls Info Display Module Lost Communication With HVAC Control Module On LIN Bus
What causes a U1509 error code?
The most common causes of U1509 include: Open or short circuit in the LIN bus circuit; Climate control module malfunction; Information display malfunction; Poor contact in connectors.
How do I fix a U1509 diagnostic trouble code?
To fix U1509: Check the integrity of the LIN bus wiring. Inspect connectors for oxidation or damage. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1509?
Yes, but get it checked soon
How much does it cost to fix U1509?
The estimated repair cost for U1509 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat