Nissan Frontier 2020 — technical service bulletin
Bulletin NTB21-002 · NHTSA communication 10186849 · issued Jan 6, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020
model years
1
vehicle entries
Official summary
2020 FRONTIER; TCM COMMUNICATION ERROR CAUSING A NO START CONDITION IF YOU CONFIRM The customer states the engine will not crank and will not start. (The incident may be intermittent.) And There is a U0101 DTC (Lost Comm TCM) in the Engine Control Unit (ECU) and/or Shifter Control Unit (SCU). This DTC may be in a PAST or CURRENT status. Or The TCM shows â UNKWNâ in the PRESENT column or â 0â in the PAST column under the CAN DIAG SUPPORT MNTR tab within the ECU (ENGINE) or the SCU (SHIFT) in CONSULT-III plus (C-III plus). See Figure 1 and Figure 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.