BYD P1D7902
Collision alarm
Quick answer
BYD DTC P1D7902 means “Collision alarm” in the VCU on applicable BYD ATTO 3 vehicles (2022–2026, Global).
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 P1D7902 mean?
BYD DTC P1D7902 means “Collision alarm” in the VCU on applicable BYD ATTO 3 vehicles (2022–2026, Global).
2. Technical explanation
Verified diagnostic evidence identifies P1D7902 as a VCU diagnostic trouble code with the meaning “Collision alarm.” The supplied evidence does not establish the specific triggering conditions, component fault, diagnostic procedure, or repair.
3. What system is affected?
Vehicle Control Unit (VCU).
4. How serious is this code?
Unknown. Severity is not established by the verified evidence.
5. Symptoms you may notice
- A stored P1D7902 diagnostic trouble code may be present.
- Additional symptoms are not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. Whether the vehicle can be driven is not established by verified evidence.
8. Can I charge the vehicle?
Unknown. Whether the vehicle can be charged is not established by verified evidence.
9. What you can safely do
- Have the vehicle assessed by a qualified BYD service provider or appropriately trained EV technician.
- Do not attempt high-voltage system repairs based on this code alone.
10. Step-by-step troubleshooting
- Confirm the stored DTC using suitable diagnostic equipment.
- Follow the applicable BYD diagnostic information. Specific test steps are not established by the verified evidence provided.
11. When to contact service
Service requirement is unknown from the verified evidence. Seek professional diagnosis if P1D7902 is present or returns after clearing.
12. What the service center may check
- Read and record all stored diagnostic trouble codes.
- Inspect and test according to applicable BYD service information. Detailed checks are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- BYD ATTO 3 · 2022–2026 · 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 source: OBDTotal technical manual index, “BYD ATTO 3 diagnostic evidence,” locator: ATTO 3 / Yuan Plus (SC2E) / P1D7902. https://obdtotal.com/product/byd-atto3-yuanplus-sc2e-service-manual/
- OBDTotal technical manual index: BYD ATTO 3 diagnostic evidence · technical_manual
19. Frequently asked questions
What does BYD code P1D7902 mean?
Verified evidence identifies P1D7902 as “Collision alarm.”
Which vehicles does this evidence apply to?
BYD ATTO 3, model years 2022 through 2026, Global applicability.
Can I drive with P1D7902?
Not yet established by verified evidence.
What repair fixes P1D7902?
Not yet established by verified evidence.