Audi U059B00
To prevent the high-voltage battery from charging during the software update, the high-voltage charging
Quick answer
For a 2020 Audi Q5 in the US, U059B00 is documented in an Audi software-update TSB only when it is logged in the battery regulation control module J840 (address 008C) together with P0AC000. The supplied evidence does not establish general drivability, charging safety, or urgency for U059B00 alone.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does U059B00 mean?
For a 2020 Audi Q5 in the US, U059B00 is documented in an Audi software-update TSB only when it is logged in the battery regulation control module J840 (address 008C) together with P0AC000. The supplied evidence does not establish general drivability, charging safety, or urgency for U059B00 alone.
2. Technical explanation
The verified NHTSA-published Audi manufacturer communications state that an improved software solution is available. The TSB applies when battery regulation control module J840, address word 008C, contains P0AC000 together with U059B00. It also applies to P0AC000 alone or P0AC000 with P33F000. The TSB does not apply when additional DTCs beyond those listed combinations are stored in J840; standard diagnosis outside the TSB is then required. The supplied title/meaning text is truncated and refers to preventing high-voltage battery charging during a software update; it should not be treated as a complete standalone definition of U059B00.
3. What system is affected?
Verified TSB context: battery regulation control module J840, address word 008C. A broader system assignment is not yet established by verified evidence.
4. How serious is this code?
Unknown. The supplied diagnostic record lists severity as unknown.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- The verified TSB identifies improved software as the published solution for the specified DTC combinations.
- A general root cause for U059B00 alone is not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. The supplied diagnostic record lists safe-to-drive status as unknown.
8. Can I charge the vehicle?
Unknown. The supplied diagnostic record lists safe-to-charge status as unknown. The TSB excerpt mentions preventing high-voltage battery charging during a software update, but does not establish normal charging guidance for a vehicle with U059B00.
9. What you can safely do
- Have a qualified Audi service provider read all DTCs in battery regulation control module J840, address 008C.
- Provide the technician with the complete stored-DTC list, because TSB eligibility depends on the exact DTC combination.
- Do not attempt high-voltage system repair or software-update procedures yourself.
10. Step-by-step troubleshooting
- Verify whether J840/address 008C contains P0AC000 with U059B00.
- Verify whether any additional DTCs are stored in J840 beyond the combinations specified by the TSB.
- If additional DTCs are present, follow standard diagnosis outside the cited TSB, as directed by the TSB.
11. When to contact service
Contact an Audi service provider for evaluation, especially to determine whether the exact J840 DTC combination qualifies for the published software update.
12. What the service center may check
- Scan battery regulation control module J840 at address word 008C.
- Confirm whether P0AC000 and U059B00 are logged together.
- Check for additional DTCs in J840, which exclude applicability of the cited TSB.
- Determine whether the vehicle is eligible for the improved software solution described in the TSB.
13. Possible repair or resolution
- For the exact eligible combinations described in the TSB, the published resolution is improved software.
- For U059B00 without P0AC000, or with additional J840 DTCs, a repair resolution is not yet established by verified evidence.
14. Affected vehicles
- Audi Q5 · 2020 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 10194492, A9321502059309_3, published May 26, 2021: https://static.nhtsa.gov/odi/tsbs/2021/MC-10194492-0001.pdf
- NHTSA Manufacturer Communication PDF 10194496, A9321512059309_4, published May 26, 2021: https://static.nhtsa.gov/odi/tsbs/2021/MC-10194496-0001.pdf
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified applicability is limited to a 2020 Audi Q5 in the United States. The cited official NHTSA-hosted Audi communications describe TSB applicability based on DTCs stored in J840/address 008C.
19. Frequently asked questions
Does the cited TSB apply to U059B00 by itself?
No. The supplied TSB evidence specifies P0AC000 in combination with U059B00 in J840/address 008C. It does not establish TSB applicability for U059B00 alone.
What if other DTCs are stored in J840?
The TSB states that it does not apply if other DTCs, in addition to the listed combinations, are logged in J840. Standard diagnosis continues outside the TSB.
Is this a confirmed charging fault?
Not yet established by verified evidence. The TSB excerpt only notes preventing high-voltage battery charging during its software-update procedure.
Is it safe to drive or charge?
Not yet established by verified evidence. Both statuses are listed as unknown in the supplied diagnostic record.