This content was compiled automatically and has not yet been reviewed by a technician. For reference only.
For reference only. Always confirm part numbers and procedures for your specific vehicle.
Fault diagnosis
BYD Qin PRO-DM: BSG cannot start the engine; concurrent P180396/P180496/P180596 case
After accident-related wiring repairs, the BSG cannot start the engine; only the conventional starter motor can start it.
BYD Qin PRO-DM: BSG cannot start the engine; concurrent P180396/P180496/P180596 case
Symptoms
- After accident-related wiring repairs, the BSG cannot start the engine; only the conventional starter motor can start it. [1]
Diagnostic trouble codes
- P180396 (manufacturer): BSG phase A missing (current fault, Fig.1) [1]
- P180496 (manufacturer): BSG phase B missing (Fig.1; the webpage body incorrectly prints GSG) [1]
- P180596 (manufacturer): BSG phase C missing (current fault, Fig.1) [1]
- P180F19 (manufacturer): Hardware overcurrent (historical fault in this case, Fig.1) [1]
Possible causes
- The case found that the BSG high-voltage busbar fastening screw was loose and burnt, and ultimately confirmed damage to the BSG controller; motor damage was not diagnosed directly from the missing-phase codes. [1]
Checks
- First check low-voltage power supply, grounds, communication and BSG live data; high-voltage fuse, busbar and phase-circuit checks must only be performed by professionals following model-specific power isolation, absence-of-voltage verification and protection procedures. Do not copy the case's energised measurements. [1]
What to do
- The original case confirmed assembly damage and restored operation after BSG controller replacement; verify BSG starting and current fault status after repair. [1]
Applicability and limits
- Source limits: BYD Qin PRO-DM, 2018 model year; BYD476ZQA engine; accident-repair context. The 4 codes belong to a single case; do not split them into separate articles to inflate the count. For inspection clues only; related parts do not constitute a replacement recommendation. No vehicle model has been linked; do not assume applicability to other models of the same brand. Scope: unknown [1]
- BYD476ZQA engine; accident-repair context; the 4 codes belong to a single case. Do not split them into separate articles to inflate the count
Related part categories
- BSG motor controller [1]
- BSG high-voltage busbar and connectors [1]
Sources
[Source 1] 2018 BYD Qin PRO-DM BSG Motor Cannot Start | Repair Case — "Fault symptoms"; "Fault diagnosis and troubleshooting", Fig.1, Figs.4–8 and steps 1–7 (accessed 2026-11-01)
https://www.casstime.com/index/news/detail/id/1705.html
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