rsos1

iTrader: (2)

I have a check engine code 28 on my 92 sc300. I have read through multiple threads and found people saying thats its the O2 sensor on the manifold closest to the firewall, and have read through some that say its the O2 sensor after the cat. Can someone please verify which one it is? Preferably someone that has had the same code.

Thanks in advance.

Mr Soarer

Funny thing is that i just the same code a couple of days ago... im guessing its the first one according to BAT auto tech... but im too lazy to change it know until it affects something like my gas mileage...

TheMole

iTrader: (13)

Yup its the main oxygen sensor that should be on the exhaust manifold.

Actually code 21 is for the front main sensor and code 28 is for the rear main oxygen sensor.

hershsc400

Oh i road around with my b1 s1 out, for about 3months(just tooo lazy)... and then put anew one in i saw my mileage go from 250/tank to 375/tank (on a 96 sc400)

what kinda car is it? 300 or 400?

TheMole

iTrader: (13)

It says so on the first sentence.

hershsc400

doh... i missed it... thanx....

kan83

how do test your o2 sensors. i have no error code though

thanks

TheMole

iTrader: (13)

Actually code 21 is for the front main sensor and code 28 is for the rear main oxygen sensor.

Mr Soarer

**** it i'm a change both wen i save up enough $$ lolz it suck to be unemployed...

Luke_in_SD

you mean you didn't have any sensors in at all? I'm getting like 240 a tank now, i used to get 320