BYD B2AB249
Electric compressor IPM/IGBT fault
Quick answer
B2AB249 is a BYD HVAC-compressor DTC meaning: Electric compressor IPM/IGBT fault.
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 B2AB249 mean?
B2AB249 is a BYD HVAC-compressor DTC meaning: Electric compressor IPM/IGBT fault.
2. Technical explanation
Verified technical-manual evidence identifies B2AB249 as an electric compressor IPM/IGBT fault, also described as compressor IPM/IGBT failure. The IPM/IGBT terminology refers to the compressor’s power-electronics function; the supplied evidence does not establish a more specific failed component or repair procedure.
3. What system is affected?
HVAC compressor / electric compressor.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- Verified evidence identifies an electric compressor IPM/IGBT fault or compressor IPM/IGBT failure. Further root 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 attempt high-voltage or compressor power-electronics repairs.
- Arrange diagnosis by a qualified BYD service provider or EV technician.
10. Step-by-step troubleshooting
- Confirm the stored DTC as B2AB249 using suitable diagnostic equipment.
- Use manufacturer-approved diagnostic information and procedures. Further troubleshooting steps are not yet established by verified evidence.
11. When to contact service
Service requirement is not yet established by verified evidence; however, professional diagnosis is appropriate because this DTC concerns the electric HVAC compressor and its IPM/IGBT function.
12. What the service center may check
- Confirm DTC B2AB249 and inspect diagnostic data using manufacturer-approved equipment.
- Further service checks are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- BYD SEAL · 2022–2026 · GLOBAL
- BYD SEALION 7 · 2024 · GLOBAL
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 technical-manual-index evidence associates B2AB249 with BYD SEALION 7 / Sealion 07 EV, model year 2024, and describes it as compressor IPM/IGBT failure. An indexed BYD SEAL European technical-training document also identifies B2AB249 as an electric compressor IPM/IGBT fault. Verified applicability in the supplied evidence: BYD SEAL, 2022–2026, Global; BYD SEALION 7, 2024, Global.
- 17VIN technical manual index: BYD SEALION 7 diagnostic evidence · technical_manual
- Indexed technical document: BYD SEAL diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code B2AB249 mean?
It means Electric compressor IPM/IGBT fault. A second verified source describes it as compressor IPM/IGBT failure.
Which vehicles are supported by the supplied evidence?
BYD SEAL model years 2022–2026, Global, and BYD SEALION 7 model year 2024, Global.
Is it safe to drive or charge with B2AB249?
Not yet established by verified evidence.
What repair fixes B2AB249?
Not yet established by verified evidence.