DTC B17FF indicates: vehicle speed pulse signal fault.
What It Means
DTC B17FF indicates: vehicle speed pulse signal fault. This code is set by the Safety System control module when it detects the condition above. It typically points to an electrical, wiring, or component-level fault rather than a software-only glitch. Technicians should read the freeze-frame data and check the related circuits, connectors, and module supply before replacing parts.
What To Do
Have the vehicle inspected by an authorized service center as soon as possible. Avoid high-load driving and repeated fault occurrences until the issue is diagnosed and resolved.
FAQ
What does DTC B17FF mean?
DTC B17FF indicates: vehicle speed pulse signal fault. It is logged by the Safety System control module and should be diagnosed before further driving or repair.
Can I keep driving with DTC B17FF?
Have the vehicle inspected by an authorized service center as soon as possible. Avoid high-load driving and repeated fault occurrences until the issue is diagnosed and resolved.
Which models does DTC B17FF apply to?
This code applies to the following BYD models: Yuan, Tang, Song, Qin. Always confirm the exact configuration against the vehicle VIN and production year.
Technical Info
| Field | Value |
|---|---|
| Code | B17FF |
| Description | vehicle speed pulse signal fault |
| System | Safety System |
| Source System | SRS |
| Severity | Level 2 — Service Required |
| Applicable Models | Yuan, Tang, Song, Qin |
Source: adapted from the dianchema.com BYD fault-code knowledge base. Disclaimer: This material is provided for professional technician reference only. Always follow the official BYD service manual for your specific vehicle. evrepairbase.com is not affiliated with BYD Auto.