U0026

Low Speed CAN Communication Bus (-) High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine Light Is On
Systems connected to the low-speed CAN bus do not work or do not work correctly
Errors in other vehicle systems
Problems with diagnostics via OBD-II connector

Causes

Short circuit in CAN circuit to power
Broken or damaged CAN bus wires
Fault in one of the modules connected to the bus
Problems with contacts in connectors
Corroded or oxidized wiring

How to Fix

Check the integrity of the CAN bus wires
Check the resistance and voltage in the CAN circuit
Inspect connectors and contacts for damage
Disable the modules one by one to find the faulty one.
Repair or replace damaged wiring

Related codes

U0027 U0028 U0029