U1889
Hybrid Control Module Lost Communication With Body Control Module
U1889 is an OBD-II diagnostic trouble code meaning: Hybrid Control Module Lost Communication With Body Control Module. Common causes: open or short circuit in the can bus, corrosion of hcm/bcm module connectors. Estimated repair cost: $89–389.
Symptoms
- Hybrid system does not activate
- Errors in the operation of body electronics
- Check Engine light comes on
- Hybrid power reduction
- Incorrect dashboard readings
Causes
- Open or short circuit in the CAN bus
- Corrosion of HCM/BCM module connectors
- Hybrid control module malfunction
- Software failure in one of the modules
- Problems with module power supply
How to Fix
- Check the integrity of the CAN wiring between the HCM and BCM
- Inspect connectors for corrosion
- Test power supply and grounding of modules
- Update module software via a dealer scanner
- Replace the faulty module if necessary
Related codes
FAQ
What does the U1889 code mean?
U1889 is an OBD-II diagnostic trouble code that indicates: Hybrid Control Module Lost Communication With Body Control Module
What causes a U1889 error code?
The most common causes of U1889 include: Open or short circuit in the CAN bus; Corrosion of HCM/BCM module connectors; Hybrid control module malfunction; Software failure in one of the modules.
How do I fix a U1889 diagnostic trouble code?
To fix U1889: Check the integrity of the CAN wiring between the HCM and BCM. Inspect connectors for corrosion. Test power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1889?
Limited driving only, diagnose soon
How much does it cost to fix U1889?
The estimated repair cost for U1889 is $89–389. Actual cost depends on your vehicle, location, and labor rates.
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