Jeep Grand Wagoneer 2026 — technical service bulletin
Bulletin 09-006-26 · NHTSA communication 11030223 · issued Mar 19, 2026
Technical service bulletin
communication type
Engine
component
2026
model years
3
vehicle entries
Official summary
Blocked Make-Up Air (MUA) Solenoid Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● P051B-00 - Crankcase Pressure Sensor Circuit Range/performance. This bulletin involves replacing the clean air duct assembly.
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.