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Audi P0AA200

voltage battery (Battery Junction Box, SX6). Do not proceed according to GFF; instead, perform the following steps in the specified sequence: Page 3 of 5 © 2021 Audi of America, In

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an Audi-qualified service facility for high-voltage-system diagnosis. The supplied official Audi bulletin evidence indicates that the prescribed diagnostic sequence should be followed for applicable P0AA200 cases.
Confidence95%

Quick answer

Audi DTC P0AA200 is identified in the verified Audi/NHTSA evidence as “Hybrid/EV Battery Positive Contactor Circuit Stuck Open.” Audi service information states that, for specified cases, technicians should not follow Guided Fault Finding (GFF) to replace the high-voltage battery switching unit/Battery Junction Box (SX6) immediately; they must use the bulletin’s specified diagnostic sequence instead.

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 P0AA200 mean?

Audi DTC P0AA200 is identified in the verified Audi/NHTSA evidence as “Hybrid/EV Battery Positive Contactor Circuit Stuck Open.” Audi service information states that, for specified cases, technicians should not follow Guided Fault Finding (GFF) to replace the high-voltage battery switching unit/Battery Junction Box (SX6) immediately; they must use the bulletin’s specified diagnostic sequence instead.

2. Technical explanation

Verified Audi technical-service-bulletin evidence identifies P0AA200 as a hybrid/EV battery positive contactor circuit stuck open fault. One bulletin specifically associates P0AA200 with symptom code 20481 in the hybrid battery management control module J840 (address word 008C). The supplied evidence also states that GFF may suggest replacement of the switching unit for the high-voltage battery, called the Battery Junction Box (SX6), but directs technicians not to proceed with that GFF replacement path and instead to follow the bulletin’s prescribed sequence. The actual diagnostic steps are not included in the supplied evidence.

3. What system is affected?

High-voltage/hybrid battery system; positive contactor circuit. Audi documentation references the high-voltage battery switching unit, also called the Battery Junction Box (SX6), and the hybrid battery management control module J840.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored DTC P0AA200 may be present in hybrid battery management control module J840, address word 008C.
  • No driver-visible symptoms are established by the supplied verified evidence.

6. Possible causes

  • A positive contactor circuit stuck-open condition is identified by the DTC definition.
  • The underlying component-level cause is 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

  • Arrange diagnosis by an Audi-qualified service facility.
  • Do not attempt high-voltage battery, contactor, or Battery Junction Box repairs yourself.
  • Provide the service facility with DTC P0AA200 and any accompanying symptom code.
  • Ask the technician to check applicable Audi service information rather than relying solely on the initial GFF replacement recommendation.

10. Step-by-step troubleshooting

  1. Audi service information directs technicians to use a specified diagnostic sequence for covered cases rather than immediately replacing the high-voltage battery switching unit/Battery Junction Box (SX6) as suggested by GFF.
  2. The detailed sequence is not contained in the supplied verified evidence.

11. When to contact service

Contact an Audi-qualified service facility for high-voltage-system diagnosis. The supplied official Audi bulletin evidence indicates that the prescribed diagnostic sequence should be followed for applicable P0AA200 cases.

12. What the service center may check

  • Confirm P0AA200 in hybrid battery management control module J840, address word 008C.
  • Check whether symptom code 20481 is present, as specifically documented in the supplied evidence.
  • Review the applicable Audi technical service bulletin and follow its specified diagnostic sequence.
  • Do not immediately replace the Battery Junction Box/SX6 solely because GFF recommends it when the bulletin applies.

13. Possible repair or resolution

  • The verified evidence does not establish a final repair for every P0AA200 occurrence.
  • For covered cases, Audi directs technicians away from immediate GFF-directed replacement of the high-voltage battery switching unit/Battery Junction Box (SX6) and toward the bulletin’s specified diagnostic sequence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi Technical Service Bulletin / NHTSA Manufacturer Communication 10199218, published July 12, 2021: identifies P0AA200 as Hybrid/EV Battery Positive Contactor Circuit Stuck Open and states that, for specified DTC cases, technicians should not proceed with GFF-directed Battery Junction Box (SX6) replacement before following the bulletin sequence.
  • Audi Technical Service Bulletin / NHTSA Manufacturer Communication 10205971, published December 22, 2021: lists P0AA200 as Hybrid/EV Battery Positive Contactor Circuit Stuck Open among high-voltage battery-related DTCs.

16. Recall information

  • No recall is established by the supplied verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Audi manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2021/MC-10199218-0001.pdf and https://static.nhtsa.gov/odi/tsbs/2021/MC-10205971-0001.pdf

19. Frequently asked questions

What does Audi code P0AA200 mean?

The supplied verified Audi/NHTSA evidence defines P0AA200 as Hybrid/EV Battery Positive Contactor Circuit Stuck Open.

Does P0AA200 mean the Battery Junction Box must be replaced?

Not necessarily. The supplied Audi bulletin states that GFF may suggest replacement of the high-voltage battery switching unit/Battery Junction Box (SX6), but directs technicians not to proceed that way and to follow a specified diagnostic sequence instead.

Which vehicles are covered by the supplied applicability data?

Supplied applicability data lists U.S. Audi A7 and Q5 model years 2020–2022, plus the U.S. Audi e-tron GT model year 2022. Exact bulletin applicability should be confirmed by a service facility.

Is it safe to drive or charge with P0AA200?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi P0AA200: voltage battery (Battery Junction Box, SX6). Do not… | EV Diagnostics