U029A
Lost Communication With Hybrid/EV Battery Pack Sensor Module
U029A is an OBD-II diagnostic trouble code meaning: Lost Communication With Hybrid/EV Battery Pack Sensor Module. Common causes: broken or damaged wiring harness to the sensor module, oxidation or poor contact in connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Hybrid system power reduction
- Switching to emergency mode
- Inaccurate battery level readings
- No regenerative braking
Causes
- Broken or damaged wiring harness to the sensor module
- Oxidation or poor contact in connectors
- Battery sensor module malfunction
- Module power problems
- Software error
How to Fix
- Check the integrity of the wiring harness to the sensor module
- Inspect and clean the connector contacts
- Check power supply and grounding of the module
- Scan the module for additional errors
- If necessary, replace the battery sensor module
Related codes
Error U029A by Vehicle Brand
FAQ
What does the U029A code mean?
U029A is an OBD-II diagnostic trouble code that indicates: Lost Communication With Hybrid/EV Battery Pack Sensor Module
What causes a U029A error code?
The most common causes of U029A include: Broken or damaged wiring harness to the sensor module; Oxidation or poor contact in connectors; Battery sensor module malfunction; Module power problems.
How do I fix a U029A diagnostic trouble code?
To fix U029A: Check the integrity of the wiring harness to the sensor module. Inspect and clean the connector contacts. Check power supply and grounding of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U029A?
Limited driving only, diagnose soon
How much does it cost to fix U029A?
The estimated repair cost for U029A is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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