U301E
Control Module Wake-up Circuit B/Open
U301E is an OBD-II diagnostic trouble code meaning: Control Module Wake-up Circuit B/Open. Common causes: broken or damaged wires in the wake-up circuit, corrosion of contacts or connectors. Estimated repair cost: $6–111.
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
Error U301E by Vehicle Brand
FAQ
What does the U301E code mean?
U301E is an OBD-II diagnostic trouble code that indicates: Control Module Wake-up Circuit B/Open
What causes a U301E error code?
The most common causes of U301E include: Broken or damaged wires in the wake-up circuit; Corrosion of contacts or connectors; Control unit B fault; Circuit fuse problems.
How do I fix a U301E diagnostic trouble code?
To fix U301E: Check the integrity of the wiring in the wake-up circuit. Inspect and clean the connector contacts. Check circuit fuse. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U301E?
Limited driving only, diagnose soon
How much does it cost to fix U301E?
The estimated repair cost for U301E is $6–111. Actual cost depends on your vehicle, location, and labor rates.
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