B2785
Communication Malfunction Between ECUs Connected by LIN
B2785 is an OBD-II diagnostic trouble code meaning: Communication Malfunction Between ECUs Connected by LIN. Common causes: open or short circuit in lin wiring harness, corroded or damaged connectors. Estimated repair cost: $56–167.
Symptoms
- Comfort functions not working (e.g. heated seats)
- Malfunctions in the operation of electronic systems
- Check Engine Light Illuminates
Causes
- Open or short circuit in LIN wiring harness
- Corroded or damaged connectors
- Malfunction of one of the ECUs in the LIN circuit
- Problems with ECU power supply
- Software error in the ECU
How to Fix
- Check the integrity of the LIN wiring harness
- Inspect connectors for corrosion or damage
- Check power supply to all ECUs in LIN circuit
- Scan all ECUs for additional errors
- If necessary, replace damaged wires or connectors
- Update the ECU firmware if an update is available
Related codes
FAQ
What does the B2785 code mean?
B2785 is an OBD-II diagnostic trouble code that indicates: Communication Malfunction Between ECUs Connected by LIN
What causes a B2785 error code?
The most common causes of B2785 include: Open or short circuit in LIN wiring harness; Corroded or damaged connectors; Malfunction of one of the ECUs in the LIN circuit; Problems with ECU power supply.
How do I fix a B2785 diagnostic trouble code?
To fix B2785: Check the integrity of the LIN wiring harness. Inspect connectors for corrosion or damage. Check power supply to all ECUs in LIN circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2785?
Limited driving only, diagnose soon
How much does it cost to fix B2785?
The estimated repair cost for B2785 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat