U1010

CAN Communication Bus - Signal Malfunction

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine light comes on
Unstable engine operation
Gear shifting problems
Failure of some electronic systems
Dashboard malfunctions

Causes

Broken or damaged CAN bus wires
Short circuit in CAN circuit
Malfunction of one of the electronic control units
Poor contact in CAN bus connectors
Problems with power supply of electronic units

How to Fix

Check the integrity of the CAN bus wires
Check CAN bus connections and connectors
Diagnose electronic control units
Check the power supply of electronic units
Replace damaged CAN bus components

Related codes

U1000 U1011 U1020