U185B
Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
U185B is an OBD-II diagnostic trouble code meaning: Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus. Common causes: broken or damaged can bus wires, poor contact in module connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Hybrid system power reduction
- Switching to emergency mode
- Incorrect display of battery charge level
- Errors in other hybrid vehicle systems
Causes
- Broken or damaged CAN bus wires
- Poor contact in module connectors
- Battery management module malfunction
- Problems with module power supply
- Software error in one of the modules
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean the contacts in the connectors
- Check power supply of modules
- Scan for other error codes
- Update module software
- Repair only from an authorized dealer
Related codes
FAQ
What does the U185B code mean?
U185B is an OBD-II diagnostic trouble code that indicates: Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module 2 On High Voltage Energy Management CAN Bus
What causes a U185B error code?
The most common causes of U185B include: Broken or damaged CAN bus wires; Poor contact in module connectors; Battery management module malfunction; Problems with module power supply.
How do I fix a U185B diagnostic trouble code?
To fix U185B: Check the integrity of the CAN bus wiring. Inspect and clean the contacts in the connectors. Check power supply of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U185B?
Limited driving only, diagnose soon
How much does it cost to fix U185B?
The estimated repair cost for U185B is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat