Network, generic

U059B Invalid Data Received From Hybrid/EV Battery Pack Sensor Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The battery pack sensor module measures pack voltage and current and often sits in the switch box that holds the main contactors, reporting to the battery management controller. Audi uses U059B00 for an implausible signal from the high-voltage battery switch box on the 2024 Q8 e-tron family: after a stop at an AC charging point the car refused to enable its drive and the cluster asked the driver to stop safely, with contactor control codes P0ADC00 and P0AE000 stored alongside. Audi traced it to over-sensitive diagnostic software, advised a 20-minute bus sleep before towing and ruled out replacing parts. The 2025 Q5 e-tron shows U059B00 together with lost contact U029A00 (index entry only). CARB requires battery system faults that stop the pack moving the vehicle to be detected.

Likely causes

Over-sensitive battery management software (Audi 2073482)
Current or voltage sensing in the switch box faulty
Battery-internal communication line or connector disturbed

Symptoms

  • Drive system cannot be activated
  • Drive system and electrical system fault messages
  • Charging interrupted

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€0–3,000
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery sensor module

Related codes

U029AU0594P0AA1

References: static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.