Jeep Wrangler 2021–2023 — technical service bulletin
Bulletin 9100121 · NHTSA communication 10231685 · issued Jan 12, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2023
model years
3
vehicle entries
Official summary
Battery Heater If you are looking for the Electronic Coolant Heater (ECH) for DTC P0E15 please order the latest level part number 68443445A$.
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.