U18B5
Lost Communication With Hybrid Powertrain Control Module On Chassis Expansion CAN Bus
U18B5 is an OBD-II diagnostic trouble code meaning: Lost Communication With Hybrid Powertrain Control Module On Chassis Expansion CAN Bus. Common causes: open or short circuit in the can bus, malfunction of the hybrid transmission control module. Estimated repair cost: $167–556.
Symptoms
- Hybrid system does not work
- Check Engine light comes on
- The car goes into emergency mode
- Reduced engine power
- Inability to charge the traction battery
Causes
- Open or short circuit in the CAN bus
- Malfunction of the hybrid transmission control module
- Module power problems
- Corroded or damaged connectors
- Software error in the module
How to Fix
- Check the integrity of the CAN bus
- Check power supply and grounding of the module
- Inspect connectors for damage
- Scan the module for additional errors
- If necessary, replace the hybrid powertrain control module
Related codes
FAQ
What does the U18B5 code mean?
U18B5 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Hybrid Powertrain Control Module On Chassis Expansion CAN Bus
What causes a U18B5 error code?
The most common causes of U18B5 include: Open or short circuit in the CAN bus; Malfunction of the hybrid transmission control module; Module power problems; Corroded or damaged connectors.
How do I fix a U18B5 diagnostic trouble code?
To fix U18B5: Check the integrity of the CAN bus. Check power supply and grounding of the module. Inspect connectors for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18B5?
Do not drive — repair immediately
How much does it cost to fix U18B5?
The estimated repair cost for U18B5 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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