U0019

Low Speed CAN Communication Bus

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–56 (est.)

Symptoms

Unstable operation of the vehicle's electronic systems
The Check Engine light comes on
Problems starting the engine
Failure of some functions (for example, climate control)
Errors in other vehicle systems

Causes

Broken or damaged CAN bus wires
Corrosion of contacts in connectors
Fault in one of the modules connected to the bus
Problems with module power supply
Interference in the electrical system

How to Fix

Check the integrity of the CAN bus wiring
Inspect and clean the contacts in the connectors
Check the power supply of the modules connected to the bus
Carry out diagnostics of all modules on the CAN bus
Replace damaged wires or faulty modules

Related codes

U0010 U0020 U0100