All codes
Service call
SC371
Yellow TD sensor detection error
BPCU / developer
Level B — stop, power-cycle may clear
First check
Y TD sensor. Developer init, then Y dev unit.
What it means
Yellow TD sensor detection error. Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- Y TD sensor. Developer init, then Y dev unit.
On-site steps
Parts to have on the truck
- Y development unit
Related codes
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.