Nissan Frontier 2020–2021 — technical service bulletin
Bulletin NTB21-086 · NHTSA communication 10202269 · issued Sep 14, 2021
Technical service bulletin
communication type
Power Train
component
2020–2021
model years
6
vehicle entries
Official summary
A/T WARNING LIGHT IS ON WITHOUT PAST OR CURRENT DTC STORED IF YOU CONFIRM The Automatic Transmission check warning light is ON, AND There are no TCM related DTCs stored that are PAST or CURRENT. ACTION 1. Confirm the current TCM part number. 2. Reprogram the TCM, if applicable. 3. Drive the vehicle and complete a transmission drive cycle. 4. Confirm that the A/T warning light does not come back ON. ï · See the Repair Overview on page 2.
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.