U0025

Low Speed CAN Communication Bus (-) Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–56 (est.)

Symptoms

Unstable operation of electronic systems
Malfunction indicator light comes on
Lost connection with some modules
Problems starting the engine
Dashboard malfunctions

Causes

Broken or damaged CAN bus wires
Corrosion or oxidation of contacts
Fault in one of the modules connected to the bus
Problems with module power supply
Damage to CAN bus terminators

How to Fix

Check the integrity of the CAN bus wires
Clean and check all contacts and connectors
Check power supply and grounding of modules
Diagnose and replace the faulty module if necessary
Check and replace CAN bus terminators if necessary

Related codes

U0026 U0027 U0028