U0085

Vehicle Communication Bus F - Open

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine light comes on
Loss of communication between modules
Incorrect operation of vehicle systems
Lack of access to diagnostic data
Dashboard malfunctions

Causes

Broken communication bus wires
Corrosion of connectors
Malfunction of one of the modules
Wiring harness damage
Problems with module power supply

How to Fix

Check the integrity of the communication bus F
Inspect connectors for corrosion
Check power supply and grounding of modules
Diagnose faulty modules
Replace damaged wires or connectors

Related codes

U0084 U0086 U0087