Nissan Pathfinder 2020 — technical service bulletin
Bulletin NTB21-025 · NHTSA communication 10191981 · issued Mar 25, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020
model years
1
vehicle entries
Official summary
2020 PATHFINDER; MIL ON WITH DTC P0037 STORED IF YOU CONFIRM The MIL is ON and DTC P0037 (HO2S2 HEATER) is stored in the ECM. ACTION 1. Confirm the current ECM part number. 2. Reprogram the ECM, if applicable.
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.