U0048

Vehicle Communication Bus C (+) Open

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine Light Is On
Malfunctions of various vehicle systems
Unstable operation of the dashboard
Lost connection with some modules
Problems with diagnostics via OBD-II

Causes

Mechanical damage to CAN bus wires
Oxidation of contacts in connectors
Broken wiring due to corrosion
Malfunction of one of the network modules
CAN circuit fuse problems

How to Fix

Visual inspection of the CAN bus wiring for damage
Checking circuit continuity with a multimeter
Cleaning contacts in connectors
Finding and replacing damaged wiring sections
Checking the functionality of all modules in the CAN network

Related codes

U0047 U0049 U0050