EV Diagnostics
Verified EV diagnostic knowledge page

BYD B2AB573

Electric compressor start-up fault

DriveUnknown. The supplied verified evidence does not establish whether the vehicle is safe to drive with B2AB573 present.
ChargeUnknown. The supplied verified evidence does not establish whether the vehicle is safe to charge with B2AB573 present.
ServiceService need is unknown in the supplied diagnostic record. Because this code concerns an electric HVAC compressor start-up fault and no verified repair instructions are provided, arrange professional assessment if the code is present or returns after clearing.
Confidence95%

Quick answer

B2AB573 is a BYD HVAC-compressor diagnostic trouble code meaning “Electric compressor start-up fault.” Verified applicability includes BYD SEAL (2022–2026, Global) and BYD SEALION 7 (2024, Global).

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does B2AB573 mean?

B2AB573 is a BYD HVAC-compressor diagnostic trouble code meaning “Electric compressor start-up fault.” Verified applicability includes BYD SEAL (2022–2026, Global) and BYD SEALION 7 (2024, Global).

2. Technical explanation

The verified technical evidence identifies B2AB573 as a fault related to electric compressor start-up. The supplied evidence does not establish the exact failed component, enabling conditions, diagnostic thresholds, root cause, or repair procedure.

3. What system is affected?

HVAC compressor; specifically the electric compressor start-up function.

4. How serious is this code?

Unknown. The verified evidence does not assign a severity level.

5. Symptoms you may notice

  • An electric compressor start-up fault is recorded as DTC B2AB573. No driver-observable symptoms are established by the supplied verified evidence.

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. The supplied verified evidence does not establish whether the vehicle is safe to drive with B2AB573 present.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether the vehicle is safe to charge with B2AB573 present.

9. What you can safely do

  • Avoid attempting high-voltage HVAC compressor diagnosis or repair yourself.
  • Have the fault read and assessed by a qualified BYD service provider or appropriately trained EV technician.
  • Record any warning messages and the conditions under which the code was detected for the service visit.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC is B2AB573 using suitable diagnostic equipment.
  2. Further troubleshooting steps, measurements, component tests, and wiring checks are not yet established by verified evidence.

11. When to contact service

Service need is unknown in the supplied diagnostic record. Because this code concerns an electric HVAC compressor start-up fault and no verified repair instructions are provided, arrange professional assessment if the code is present or returns after clearing.

12. What the service center may check

  • Confirm DTC B2AB573 and review associated diagnostic data, if available.
  • Specific manufacturer-prescribed service checks are not yet established by verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Not yet established by verified evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified sources: 17VIN technical manual index, “BYD SEALION 7 diagnostic evidence,” locator “SEALION 7 | Sealion 07 EV / 2024 | B2AB573,” describing compressor start-up failure; and Indexed technical document, “BYD SEAL diagnostic evidence,” locator “SEAL | European technical-training vehicle | B2AB573,” describing electric compressor start-up fault. The diagnostic record was last verified on 2026-09-25.

19. Frequently asked questions

What does BYD code B2AB573 mean?

It means “Electric compressor start-up fault.”

Which vehicles are supported by verified evidence?

BYD SEAL model years 2022–2026 in the Global region, and BYD SEALION 7 model year 2024 in the Global region.

Can I drive with B2AB573?

Not yet established by verified evidence.

Can I charge with B2AB573?

Not yet established by verified evidence.

What causes B2AB573?

Not yet established by verified evidence.

20. Sources & verification

Verified
BYD B2AB573: Electric compressor start-up fault | EV Diagnostics