Lost Communication With Hybrid/EV Battery Pack Sensor Module

Where it lives

For U029A, the part to look at first is the sensor named here.

Check these first

• Damaged wiring between the battery pack sensor module and the onboard computer
• A failed hybrid battery pack sensor module
• Corrosion or water at the module connectors
• A software fault in the onboard computer
• Physical damage to the battery pack

What to do next

1. Inspect the wiring and connector at the hybrid battery pack sensor module
2. Check the module for water or corrosion damage
3. Update the onboard computer software
4. Inspect the battery pack for physical damage
5. Replace the battery pack sensor module if it stays offline
6. Clear the code and retest

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