U301E

Control Module Wake-up Circuit B/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–111 (est.)

Symptoms

Problems starting the engine
Failure of vehicle electronic systems
The control unit does not wake up from sleep mode
Information systems do not work correctly

Causes

Broken or damaged wires in the wake-up circuit
Corrosion of contacts or connectors
Control unit B fault
Circuit fuse problems

How to Fix

Check the integrity of the wiring in the wake-up circuit
Inspect and clean the connector contacts
Check circuit fuse
Diagnose control unit B
Repair only from an authorized dealer

Related codes

U301D U301F U3020