Umbrella Valve Seal Missing From Cylinder Vehicle may exhibit a MIL-ON. SYMPTOM: Upon inspection the...
Jeep technical service bulletin 09-020-26 for 2026-2027 Jeep Grand Cherokee and 2026-2027 Jeep Grand Cherokee L.
- Bulletin number
- 09-020-26
- Component
- Engine
- Summary
- Umbrella Valve Seal Missing From Cylinder Vehicle may exhibit a MIL-ON. SYMPTOM: Upon inspection the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have set: ● P0300-00 - Random/Multiple Cylinder Misfire Detected. ● P0301-00 - Cylinder 1 Misfire. ● P0302-00 - Cylinder 2 Misfire. ● P0303-00 - Cylinder 3 Misfire. ● P0304-00 - Cylinder 4 Misfire. This bulletin involves inspecting for a missing umbrella valve seal on the underside of the cylinder head cover and, if necessary, replacing the cylinder head cover.
Owners of these vehicles have filed 43 complaints in the engine category.
Vehicles covered
- Jeep Grand Cherokee 2026-2027 20262027
- Jeep Grand Cherokee L 2026-2027 20262027
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