U1831
Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module On Powertrain Expansion CAN Bus
U1831 is an OBD-II diagnostic trouble code meaning: Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module On Powertrain Expansion CAN Bus. Common causes: broken or damaged wires in the can bus, poor contact in module connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Reduced power or performance
- Switching to emergency mode
- Charging problems (for hybrid/electric cars)
- Unstable engine operation
Causes
- Broken or damaged wires in the CAN bus
- Poor contact in module connectors
- Engine control module malfunction
- Hybrid/Electric Powertrain Control Module Malfunction
- Problems with module power supply
How to Fix
- Check the integrity of the CAN bus wiring and connectors
- Check power supply and grounding of modules
- Scan other modules for communication errors
- Check and, if necessary, replace faulty modules
- Repair only from an authorized dealer
Related codes
FAQ
What does the U1831 code mean?
U1831 is an OBD-II diagnostic trouble code that indicates: Drive Motor Control Module 1 Lost Communication With Hybrid/EV Powertrain Control Module On Powertrain Expansion CAN Bus
What causes a U1831 error code?
The most common causes of U1831 include: Broken or damaged wires in the CAN bus; Poor contact in module connectors; Engine control module malfunction; Hybrid/Electric Powertrain Control Module Malfunction.
How do I fix a U1831 diagnostic trouble code?
To fix U1831: Check the integrity of the CAN bus wiring and connectors. Check power supply and grounding of modules. Scan other modules for communication errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1831?
Limited driving only, diagnose soon
How much does it cost to fix U1831?
The estimated repair cost for U1831 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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