U0296
Lost Communication With AC/DC Converter Control Module A
The vehicle bus reports loss of communication with AC/DC converter (on-board charger) module A. Charging from AC sources cannot be controlled and the high-voltage battery does not refill via this path.
The vehicle bus reports loss of communication with AC/DC converter (on-board charger) module A. Charging from AC sources cannot be controlled and the high-voltage battery does not refill via this path.
Common causes
- high
Bus wiring open or shorted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $440-3300
- medium
Module without power or ground
A plausible cause — test and verify before replacing parts.
Typical part cost: $440-3300
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does U0296 mean?
U0296 means "Lost Communication With AC/DC Converter Control Module A". It is a generic OBD-II code that points to a fault in the network / communication.
What are the most common causes of U0296?
bus wiring open or shorted; module without power or ground; module failed — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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