Rotten Egg Smell During Acceleration
A rotten egg (sulfur) smell when accelerating in a 2020 Jeep Wrangler typically indicates a rich fuel mixture or a failing catalytic converter. The smell is caused by hydrogen sulfide gas produced when the catalytic converter is not operating efficiently, often due to unburned fuel or engine misfires.
Diagnosis Details
Possible Causes
Failing catalytic converter – internal damage or clogging prevents proper conversion of sulfur in fuel, releasing hydrogen sulfide.
Rich fuel mixture – faulty oxygen sensor, fuel injector leak, or mass airflow sensor causing excess fuel in exhaust.
Engine misfire – spark plug or ignition coil issue leading to unburned fuel entering the exhaust system.
Related OBD-II Codes
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What You Should Do
Check for diagnostic trouble codes using an OBD-II scanner.
Inspect catalytic converter for damage or clogging.
Test oxygen sensors and fuel trim data.
Verify spark plugs and ignition coils for misfires.
If no codes, consider fuel quality or a short drive to clear the system.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
