Brenticus

iTrader: (2)

Reason for code: HO2S Insufficient Switching

Any thoughts?

TurkSS

Actually just got this code recently as well. Replaced o2 went away for 3 days and came back no idea now. More help would be great

BLAZIN07SS

iTrader: (7)

an engine is tuned to switch between rich and lean during cruise. ~14.7AFR is stoich. the higher the number the leaner, the lower the number the richer. they are designed to go rich to lean many times per second(its an emissions thing). if it does not switch enough you throw the insufficient switching code

Brenticus

iTrader: (2)

Is there a simple way to correct this?

jthomas9

bump i would like to know this answer too.

dannysauer

iTrader: (3)

Well have u replaced your front o2 if so did u go with the oem or Bosch cuz those r **** and need to be trashed

jthomas9

I acutally just unplugged my o2 sensor and plugged it back in. The cel went away and I passed inspection. Who knew?? This all happened today.

Littlegoose

Get rid of any exhaust leaks too. If youre not sure if you have any, do a search for "Seafoam" for an easy way to find them.