Jeep Grand Cherokee 2021–2022 — technical service bulletin
Bulletin 1806122 · NHTSA communication 10229167 · issued Mar 29, 2022
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2021–2022
model years
2
vehicle entries
Official summary
Incorrectly Assembled Purge Flow Tube Inside Tube Elbow This bulletin involves inspecting and if needed reposition the purge tube inside the tube elbow. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find oneor more of the following Diagnostic Trouble Codes (DTCs). P0441 - EVAP Purge System Performance. P0452 - EVAP Pressure Switch ?A? Stuck Closed.
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.