Honda CR-V 2020 — technical service bulletin
Bulletin A19110B · NHTSA communication 10168043 · issued Nov 13, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020
model years
1
vehicle entries
Official summary
ServiceNews Article - The 2020 CR-V comes with two backup fuses: No. 18 BACK UP (10A) and No. 27 BACK UP 2 (30A). If you pull the No. 27 fuse (or it's blown), and turn the ignition to ON while leaving the No. 18 fuse intact, it will set DTC B123F (automatic lighting control unit/sunlight sensor error).
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.