U301F
Control Module Wake-up Circuit B Low
U301F is an OBD-II diagnostic trouble code meaning: Control Module Wake-up Circuit B Low. Common causes: wiring harness damage, poor contact in connectors. Estimated repair cost: $17–56.
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
Error U301F by Vehicle Brand
FAQ
What does the U301F code mean?
U301F is an OBD-II diagnostic trouble code that indicates: Control Module Wake-up Circuit B Low
What causes a U301F error code?
The most common causes of U301F include: Wiring harness damage; Poor contact in connectors; Control module malfunction; Short circuit in the circuit.
How do I fix a U301F diagnostic trouble code?
To fix U301F: Check the voltage in the wake-up circuit. Inspect the wiring harness for damage. Check and clean connector contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U301F?
Yes, but get it checked soon
How much does it cost to fix U301F?
The estimated repair cost for U301F is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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