JEEP

09-026-25

2025-09-03 · NHTSA 11023069

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

Not applicable to vehicles built for US market. Spark Plug Melting Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0300 -00 - Random/Multiple Cylinder - Misfire Detected. ● P0301 -00 - Cylinder 1 - Misfire Detected. ● P0302 -00 - Cylinder 2 - Misfire Detected. ● P0303 -00 - Cylinder 3 - Misfire Detected. ● P0304 -00 - Cylinder 4 - Misfire Detected. ● P1336 -00 - Combustion misfiring (impact on catalytic converter) : Cylinder undetermined. ● P1337 - Combustion misfiring (impact on catalytic converter) : Cylinder 1. ● P1338 - Combustion misfiring (impact on catalytic converter) : Cylinder 2. ● P1339 - Combustion misfiring (impact on catalytic converter) : Cylinder 3. ● P1340 - Combustion misfiring (impact on catalytic converter) : Cylinder 4. Customers may also experience one or more of the following: ● Engine makes a loud metallic knocking noise at idle. ● Difficulty starting. ● Rough and noisy idle This bulletin involves inspecting for DTCs, inspecting for engine leaks and/or damage, and replacing the spark plugs.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.