U1891
Hybrid Control Module Lost Communication With Instrument Panel Cluster
U1891 is an OBD-II diagnostic trouble code meaning: Hybrid Control Module Lost Communication With Instrument Panel Cluster. Common causes: open or short circuit in the can bus, poor contact in hcm or ipc connectors. Estimated repair cost: $56–278.
Symptoms
- No hybrid system information displayed on dashboard
- Check Engine Light or Hybrid System Warning Illuminated
- Incorrect instrument readings
- Loss of some functions on the dashboard
- Possible problems with switching hybrid system modes
Causes
- Open or short circuit in the CAN bus
- Poor contact in HCM or IPC connectors
- Hybrid control module malfunction
- Problems with the instrument cluster
- Software glitches
How to Fix
- Check the integrity of the CAN bus between HCM and IPC
- Inspect and clean contacts in module connectors
- Check power and ground on both modules
- Scan all modules for additional fault codes
- Update or reflash the software if necessary
Related codes
FAQ
What does the U1891 code mean?
U1891 is an OBD-II diagnostic trouble code that indicates: Hybrid Control Module Lost Communication With Instrument Panel Cluster
What causes a U1891 error code?
The most common causes of U1891 include: Open or short circuit in the CAN bus; Poor contact in HCM or IPC connectors; Hybrid control module malfunction; Problems with the instrument cluster.
How do I fix a U1891 diagnostic trouble code?
To fix U1891: Check the integrity of the CAN bus between HCM and IPC. Inspect and clean contacts in module connectors. Check power and ground on both modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1891?
Limited driving only, diagnose soon
How much does it cost to fix U1891?
The estimated repair cost for U1891 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat