Jeep Gladiator 2018–2022 — technical service bulletin
Bulletin 09-015-25 · NHTSA communication 11019618 · issued Jun 13, 2025
Technical service bulletin
communication type
Engine
component
2018–2022
model years
13
vehicle entries
Official summary
"Spark Knock/Engine Symptoms Customers may experience the following: ● Knocking or pinging noise coming from the engine upon acceleration. This bulletin involves cleaning the piston heads and cylinder head combustion chambers to resolve a spark knock condition being caused by oil intrusion through the PCV system."
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.