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Audi B107A16

Supply voltage for park assist sensor Voltage too low

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an Audi dealer or qualified Audi service facility if the parking aid is inoperative, “Parking Aid: Malfunction!” is displayed, or B107A16 is stored. Ask them to check applicable Audi software guidance and TSB 2069244 where applicable.
Confidence95%

Quick answer

Audi DTC B107A16 means: “Supply voltage for park assist sensor — Voltage too low.” Verified Audi bulletins document that it can be associated with an inoperative acoustic/optical parking aid and a “Parking Aid: Malfunction!” instrument-cluster message. On certain vehicles, Audi states a software malfunction can store this DTC erroneously.

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 B107A16 mean?

Audi DTC B107A16 means: “Supply voltage for park assist sensor — Voltage too low.” Verified Audi bulletins document that it can be associated with an inoperative acoustic/optical parking aid and a “Parking Aid: Malfunction!” instrument-cluster message. On certain vehicles, Audi states a software malfunction can store this DTC erroneously.

2. Technical explanation

The code is stored in the driver assistance systems control module J1121 (address word 00A5) with symptom code 233474 in the cited Audi material. Audi’s 2020 bulletin identifies a software malfunction as a reason B107A16 may be entered erroneously. A later Audi communication for MY2021–2022 directs technicians to TSB 2069244 for driver-assistance-system improvements involving B107A16. That update may still leave B107A16 stored, but Audi states the fault should no longer cause permanent symptoms until the DTC is cleared; symptoms should resolve after an ignition cycle.

3. What system is affected?

Park assist / acoustic and optical parking aid; driver assistance systems control module J1121 (address word 00A5).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Acoustical and optical parking aid may be inoperative.
  • “Parking Aid: Malfunction!” may be displayed in the instrument cluster.
  • Some driver-assistance settings may be affected; the supplied evidence does not establish which settings.

6. Possible causes

  • For certain Audi vehicles covered by the cited 2020 bulletin, a software malfunction can cause B107A16 to be stored erroneously.
  • Other causes are not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Do not rely on the acoustic or optical parking aid if it is inoperative or a parking-aid malfunction message is displayed.
  • Use normal visual checks and caution while parking or maneuvering.
  • Arrange Audi service diagnosis and provide the stored DTC and any displayed message.

10. Step-by-step troubleshooting

  1. Have a qualified Audi service facility read fault memory and confirm whether B107A16 is stored in J1121/address 00A5.
  2. For applicable MY2021–2022 vehicles, ask the service facility to assess the vehicle against Audi TSB 2069244, referenced by Audi communications as covering driver-assistance-system improvements involving B107A16.
  3. No owner-performed electrical or high-voltage diagnostic procedure is established by the verified evidence.

11. When to contact service

Contact an Audi dealer or qualified Audi service facility if the parking aid is inoperative, “Parking Aid: Malfunction!” is displayed, or B107A16 is stored. Ask them to check applicable Audi software guidance and TSB 2069244 where applicable.

12. What the service center may check

  • Confirm B107A16 with symptom code 233474 in driver assistance systems control module J1121/address 00A5.
  • Assess whether the vehicle falls within the applicable model year, model, and U.S. market coverage cited in Audi communications.
  • For MY2021–2022 vehicles referenced by the supplied evidence, follow Audi TSB 2069244 as applicable.
  • Use the calculated ODIS test plan where directed by Audi documentation.

13. Possible repair or resolution

  • Audi documentation identifies software-related handling for certain affected vehicles.
  • Audi states that after the referenced update, B107A16 can remain stored but should no longer create permanent symptoms until the DTC is cleared; symptoms should resolve following an ignition cycle.
  • The exact repair for an individual vehicle is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi TSB/Manufacturer Communication 2061689, published through NHTSA as MC-10203163 (2021): documents B107A16, an inoperative acoustic/optical parking aid, and “Parking Aid: Malfunction!”.
  • Audi TSB/Manufacturer Communication 2061689, published through NHTSA as MC-10185279 (2020): states a software malfunction can cause B107A16 to be entered erroneously.
  • Audi TSB 2069244: referenced in supplied 2023 Audi communications for MY2021–2022 vehicles as “90 Driver Assist Systems various improvements” involving B107A16.
  • NHTSA manufacturer communications MC-10231568, MC-10231569, and MC-10231570 reference TSB 2069244 for applicable MY2021–2022 vehicles.

16. Recall information

  • No recall is established by the supplied verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Audi communications: https://static.nhtsa.gov/odi/tsbs/2021/MC-10203163-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2020/MC-10185279-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2023/MC-10231571-0001.pdf

19. Frequently asked questions

What does Audi B107A16 mean?

It means “Supply voltage for park assist sensor — Voltage too low.”

Can B107A16 be caused by software?

Yes, for vehicles covered by Audi’s 2020 bulletin, Audi states that a software malfunction can cause the DTC to be entered erroneously.

What may I notice with B107A16?

Verified Audi documentation reports an inoperative acoustic/optical parking aid and a “Parking Aid: Malfunction!” instrument-cluster message.

Will an ignition cycle help?

Audi states that after the referenced update, symptoms should resolve after an ignition cycle even if B107A16 remains stored until cleared. This does not establish that an ignition cycle resolves the underlying condition on every vehicle.

Is this a recall?

No recall is established by the supplied verified evidence.

20. Sources & verification

Verified
Audi B107A16: Supply voltage for park assist sensor Voltage too low | EV Diagnostics