Jeep Gladiator 2018–2022 — technical service bulletin
Bulletin 0901222 · NHTSA communication 10227734 · issued Oct 1, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2022
model years
13
vehicle entries
Official summary
Spark Knock/Engine Symptoms This bulletin involves cleaning the piston heads and cylinder head combustion chambersto resolve a spark knock condition being caused by oil intrusion through the PCV system. The customer may describe a knocking or pinging noise coming from the engine upon acceleration.
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.