U029A

Lost Communication With Hybrid/EV Battery Pack Sensor Module

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

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

U0299 U029B U0298