BYD B2AB349
Electric compressor internal temperature sensor fault
Quick answer
B2AB349 indicates an electric compressor internal temperature sensor fault in the HVAC compressor system.
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 B2AB349 mean?
B2AB349 indicates an electric compressor internal temperature sensor fault in the HVAC compressor system.
2. Technical explanation
Verified evidence identifies B2AB349 as “Electric compressor internal temperature sensor fault” for BYD vehicles. The evidence does not establish the specific electrical or mechanical failure mechanism, diagnostic threshold, or repair procedure.
3. What system is affected?
HVAC compressor (electric compressor internal temperature sensor).
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
- A fault involving the electric compressor internal temperature sensor is established by the DTC meaning.
- Specific underlying 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 compressor diagnosis or repair without appropriate manufacturer procedures and qualified service support.
- Arrange professional diagnosis if the DTC is present.
10. Step-by-step troubleshooting
- Confirm that diagnostic trouble code B2AB349 is stored using suitable diagnostic equipment.
- Have a qualified BYD service provider diagnose the HVAC compressor system. Further test steps are not established by the verified evidence supplied.
11. When to contact service
Professional diagnosis is appropriate because this code concerns the electric HVAC compressor and its internal temperature sensor. The need for immediate service is not yet established by verified evidence.
12. What the service center may check
- Verify the presence of B2AB349.
- Diagnose the electric compressor internal temperature sensor fault according to applicable BYD service information. Specific checks are not established by the verified evidence supplied.
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
- No technical service bulletin information was supplied in the verified evidence.
16. Recall information
- No recall information was supplied in the verified evidence.
17. Official manufacturer information
Verified technical-manual evidence supports B2AB349 for BYD SEAL and BYD SEALION 7. Sources: 17VIN technical manual index, “BYD SEALION 7 diagnostic evidence,” locator “SEALION 7 | Sealion 07 EV / 2024 | B2AB349”; and Indexed technical document, “BYD SEAL diagnostic evidence,” locator “SEAL | European technical-training vehicle | B2AB349.”
- 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 B2AB349 mean?
It means electric compressor internal temperature sensor fault.
Which vehicles are supported by the supplied evidence?
BYD SEAL model years 2022–2026 (GLOBAL) and BYD SEALION 7 model year 2024 (GLOBAL).
Can I drive or charge with B2AB349?
Not yet established by verified evidence.