U301F

Control Module Wake-up Circuit B Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Problems starting the car
Unstable operation of electronic systems
Check Engine Light Is On
Failure of individual vehicle functions

Causes

Wiring harness damage
Poor contact in connectors
Control module malfunction
Short circuit in the circuit

How to Fix

Check the voltage in the wake-up circuit
Inspect the wiring harness for damage
Check and clean connector contacts
Test the control module
Replace damaged components

Related codes

U3000 U301E U3020