Fix It Finder

O2 sensor anti fouler fix

FMJeeping · 124K views · 1:00

Skill Level

Intermediate

Time Required

< 1 hr

Estimated Cost

$0–50

Equipment

Toyota RAV4

Permit Required

No

Tools Needed

Socket set, Wrench, Jack and jack stands, Gasket scraper
This is a great "temporary" fix to a catalyst converter that is causing a check engine light on your downstream O2 sensor. I removed my cat because I am running a suspension that would interfere with the routing of the exhaust. My Jeep is basically a trail rig and I no longer need the cat. This modification simulates the O2 seeing the heat of the exhaust while getting a non direct flow of the exhaust making it think the cat is working correctly. This has worked on many cars that I have put it on with good success.