U0090

Vehicle Communication Bus G (-) High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Loss of communication between vehicle modules
Inoperative or incorrectly functioning systems
Check Engine Light Illuminates
Problems with diagnostics via OBD-II

Causes

Damage to communication bus wiring
Poor contact in connectors
Electronic module malfunction
Short circuit in the circuit

How to Fix

Check the integrity of the communication bus wiring
Inspect and clean connectors
Check the condition of electronic modules
Replace damaged wires or connectors

Related codes

U0089 U0091 U0100