U0020

Low Speed CAN Communication Bus Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–56 (est.)

Symptoms

Unstable operation of electronic systems
Delays in dashboard response
Intermittent errors on the display
Problems starting the engine

Causes

Broken or damaged CAN bus wires
Contact corrosion
Fault in one of the modules connected to the bus
Problems with module power supply

How to Fix

Check the integrity of the CAN bus wiring
Inspect and clean contacts
Check power supply of modules
Diagnose and replace faulty modules

Related codes

U0010 U0030 U0040