U0240
Lost Communication With Entrapment Control Module B
U0240 is an OBD-II diagnostic trouble code meaning: Lost Communication With Entrapment Control Module B. Common causes: open or short circuit in can circuit, hold control module b malfunction. Estimated repair cost: $56–167.
Symptoms
- Power windows or sunroof do not work
- Error message on the dashboard
- Incorrect operation of comfort systems
- Disabling related security features
- Check Engine light comes on
Causes
- Open or short circuit in CAN circuit
- Hold Control Module B Malfunction
- Module power problems
- Corrosion of connectors
- Software error in the module
How to Fix
- Check the integrity of the CAN bus wiring harness
- Diagnose power supply of hold control module B
- Inspect and clean module connectors
- Check module functionality
- Update module software
- Repair only from an authorized dealer
Related codes
Error U0240 by Vehicle Brand
FAQ
What does the U0240 code mean?
U0240 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Entrapment Control Module B
What causes a U0240 error code?
The most common causes of U0240 include: Open or short circuit in CAN circuit; Hold Control Module B Malfunction; Module power problems; Corrosion of connectors.
How do I fix a U0240 diagnostic trouble code?
To fix U0240: Check the integrity of the CAN bus wiring harness. Diagnose power supply of hold control module B. Inspect and clean module connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0240?
Limited driving only, diagnose soon
How much does it cost to fix U0240?
The estimated repair cost for U0240 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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