Jeep Cherokee 2021 — technical service bulletin
Bulletin 18-078-22 · NHTSA communication 10214622 · issued May 19, 2022
Technical service bulletin
communication type
Equipment
component
2021
model years
1
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following DTCs have been set: P0031 - O2 Sensor 1/1 Heater Circuit Low. U0418 - Implausible Data Received From Brake System Control Module. DTC U0418 can be set erroneously due to a low battery (below 10 volts).
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.