U0050

Vehicle Communication Bus C (+) High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine Light Is On
Incorrect operation of various vehicle systems
Lack of communication with some modules during diagnostics
Floating instrument readings
Reduced engine performance

Causes

Open or short circuit in the CAN bus (+)
Poor contact in CAN bus connectors
Contact corrosion
Fault in one of the modules connected to the bus
Wiring harness damage

How to Fix

Check the integrity of the CAN bus wiring
Inspect and clean the contacts in the connectors
Check the voltage on the CAN bus
Disable the modules one by one to find the faulty one.
If necessary, replace damaged wires or connectors

Related codes

U0051 U0052 U0053