Jeep Wrangler 2021–2022 — technical service bulletin
Bulletin 9004533 · NHTSA communication 10214521 · issued May 4, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2022
model years
2
vehicle entries
Official summary
PUMP, Auxiliary Coolant Customer experiences Check Engine Light with DTC/ P026 E, P023 A, or P023 B all related to Coolant Pump performance. Dealers are replacing Auxiliary Coolant Pump Part #68290300AA. Then draining and refilling coolant. If vehicle has DTC/ P026 E, P023 A, or P023 B present, drain and refill coolant before changing the pump making sure all air is out of the system, then clear codes. If any of these codes return, change Aux Coolant Pump Any questions or concerns, please contact FCA Redacted Content. If no response in 15 minutes, proceed with repair.
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.