Hey whats up guys, I went and got the codes that was throwing the ses light, and here is what i got, help me out if u can. Thanks in advance, Dave.

P0140
No Activity (bank 1, Sensor 2) <-- this is the ones i am not sure of

P0160
O2 Sensor CKT No Activity (Bank 2, Sensor 2) <--- i already ordered 2 new o2 sensors

P0300
Random/Multiple Cyclinder misfire detected <--- have new wires/plugs on the way.

P0400
Egr Flow malfunction (gee, who removed that )

I really just need help with the first one and what that is. Thanks again. David

 

P0140: HO2S Circuit Insufficient Activity Bank 1 Sensor 2

I believe that's the heater circuit for the post cat O2 sensor on the drivers side

 

Oh ok, i dont have rear 02 sensoes, i just removed them, and thats prolly the code for it. THanks man, David.

 

yup that'd do it that P0160 is also for the post cat O2

 

So my front o2 sensors are OK?? I already ordered them, i have 70k on my LT1, is it a good idea to replace them anyway??? THanks, David.

 

replacing them couldn't hurt... but prolly unnecessary...
Bank 1 = Drivers side
Bank 2 = Passenger Side
Sensor 1 = pre cat
Sensor 2 = post cat

so yea looks like your fronts are ok

 

Thanks a bunch man

 

where can I find information on the code numbers and their meanings. my ses light just came on for the first time and need to know what the codes mean. I am getting a hand held obd2 thing from my buddy.

 

www.obdii.com