Nissan Titan 2020–2021 — technical service bulletin
Bulletin NTB21-001B · NHTSA communication 10222864 · issued Oct 6, 2022
Technical service bulletin
communication type
Electrical System
component
2020–2021
model years
4
vehicle entries
Official summary
TCM COMMUNICATION ERROR CAUSING A NO START CONDITION SERVICE INFORMATION If a customer states the engine will not crank and will not start (may be intermittent) and DTC U0101 (Lost Comm TCM) is stored in the ECU (ENGINE), and/or stored in the SCU (SHIFT) as PAST or CURRENT, OR The TCM shows as â UNKWNâ in the PRESENT column, or â 0â in the PAST column, under the CAN DIAG SUPPORT MNTR tab in the ECU or SCU in C-III plus. ï · Please check Service COMM or Dealer Business Systems (DBS) National Service History to confirm if campaign R22B1 or R22A9 has been applied. 1. Has campaign R22B1 or R22A9 a
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.