U0051

Vehicle Communication Bus C (-) Open

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Inoperative or incorrectly functioning vehicle systems
The Check Engine light comes on
Problems with diagnostics via OBD-II connector
Dashboard malfunctions
Communication errors between modules

Causes

CAN-C bus wire break
Short circuit in the circuit
Oxidized or damaged contacts
Malfunction of one of the modules in the network
Wiring harness damage

How to Fix

Visual inspection of CAN-C bus wiring
Checking resistance and continuity
Diagnostics of contacts in connectors
Replacing damaged wiring sections
Flashing or replacing faulty modules

Related codes

U0050 U0052 U0053