MeanWS6

total newb q

But I am getting P1133 an P1153 O2 switching codes, my car idles and runs like crap (stubbles), and getting HORRIBLE gas milage.

So where are they, what do they look like, how to replace em?
I am assuming these codes means I have to replace the front o2's???

do I need to reset the PCM after the replacment or anything else afterwords?

bowtieman81

iTrader: (35)

You need to know the code description. It will tell you which sensors to replace. If you have an ory, then you only have 2 O2 sensors. If you have cats then you have 4 sensors.

Read the code description: Bank 1 is driver side, bank 2 is passenger side of car; sensor 1 is the sensor before the cats, sensor 2 is the sensor after the cats. The code will likely say something like HO2S Bn1 Sen1 insufficeint switching. In this case it would be the driver side sensor in the exhaust manifold (or header).

To replace them just get a line wrench, or a O2 sensor socket if you have one and take it out. You might shoot it with some penetrating oil and let soak for a few minutes first.

Another_User

Wrenches suck. I went and bought an O2 socket (for just in case) yesterday. You can tell what it is because it has a thin slit along the socket for the wire to poke out while you take the sensors out.

jimmy 2 Times

iTrader: (18)

yes, 02 sockets are the way to go

Viper

iTrader: (6)

Crescent wrench here, for years, works fine.

Anyway as posted in your other thread, test them first before replacing.

rawlitogut

Do you have an exhaust leak?

MeanWS6

I think, gonna check into that also before replacing stuff