U0094

Vehicle Communication Bus H (+) Open

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine Light Is On
Some systems do not work (climate control, multimedia, etc.)
Communication errors in other modules
Floating electrical faults
The car may go into emergency mode

Causes

Mechanical damage to CAN bus wires
Corrosion or oxidation of contacts
Malfunction of one of the CAN network modules
Fuse box problems
Incorrect connection of equipment after repair

How to Fix

Check the integrity of the CAN bus wiring
Inspect connectors and contacts for corrosion
Check fuses associated with the CAN bus
Diagnose modules connected to the CAN network
Check resistance and voltage on CAN lines

Related codes

U0100 U0121 U0140