U1845
Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module
U1845 is an OBD-II diagnostic trouble code meaning: Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module. Common causes: broken or damaged wires in the can bus, control module power problems. Estimated repair cost: $56–278.
Symptoms
- CHECK ENGINE indicator lights up
- The car goes into emergency mode
- Reduced power or performance
- Gear shifting problems
- Possible charging problems (for hybrids)
Causes
- Broken or damaged wires in the CAN bus
- Control module power problems
- Engine control module malfunction
- Hybrid control module malfunction
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the CAN bus and wiring
- Check the power supply to the control module
- Diagnose the engine control module
- Check hybrid control module
- Clean or replace damaged connectors
Related codes
FAQ
What does the U1845 code mean?
U1845 is an OBD-II diagnostic trouble code that indicates: Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module
What causes a U1845 error code?
The most common causes of U1845 include: Broken or damaged wires in the CAN bus; Control module power problems; Engine control module malfunction; Hybrid control module malfunction.
How do I fix a U1845 diagnostic trouble code?
To fix U1845: Check the integrity of the CAN bus and wiring. Check the power supply to the control module. Diagnose the engine control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1845?
Do not drive — repair immediately
How much does it cost to fix U1845?
The estimated repair cost for U1845 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat