that's right...i got the damn thing scanned, #1 O2 bank 1 #1 O2 bank 2...put stock MAF back on thinking MAYBE just maybe it was the Granatelli MAF running lean...still throwing it...so i go get new O2's install them, disconnect battery...still throwing the F-N code!?!?! what's the deal? do i have to get the code cleared through a scanner? why else would it be throwing the O2 codes? I am running rich now, could that have something to do with it? what if i mixed up the sensors and put the short wired one where the long wired one goes? so many questions...so little answered! HELP!!! thanks!

 

What were the specific codes? Almost impossible to help without knowing that. There are several O2 sensor codes that are generally the result of problems elsewhere in the system.

 

A shorted wire from the sensor to the PCM could also cause codes. Might check the harnesses to make sure that they're not burnt or anything.

 

P0153 and P0133 both CTK Slow response...that help? thanks

 

It indicates the problem isn't a result of running rich or lean, nor of having problems with the heater circuit power supply. Also indicates that the sensors are covering the normal range of voltage swings, but the changes are too slow. Should be the type of problem you solve with new sensors.

What do you mean by:
Are you suggesting that somehow you switched the pre-cat and after-cat sensors? Putting the wrong sensors in the wrong locations would mean the PCM is trying control the A/F ratio with the after-cat sensors, which would certainly screw things up. But its hard to understand how that could happen.

 

Yeah that's what i thought but the new sensors are in and the SES light is still on...i'm gonna go get it rescanned today and if it's the same thing i'm just gonna get em to clear it...what i meant by the wires, the bank 1 and bank 2 #1 sensors are 2 different part numbers, one wire harness is shorter than the other so i didn't know if i put the bank 1 on the bank 2 side if that would screw with the voltage? also could back pressure have anything to do with it since i have LT's ORY-pipe and 3" exhaust with SLP LM? thanks a lot!

 

After doing my header install, I got the P0133 code. After following Injuneer's and Shoebox's advice from previous posts that I dug up, I replaced the two front 02 sensors. The code did not magically go away, but my friend has a Snap-On scanner and deleted them for me and they never came back after already two months. So I would say go ahead and clear them and see where that takes you.

 

well i wet by Advance Auto to get the code erased and when he scanned it, it came up as a damn knock sensor code! so now i guess i need a new knock sensor??? the codes that came up say "Transient DTC P0327 Knock Sensor 1 Curcuit Low Input" and the other one is "Transient DTC P1133 HO2S Bank 1 Sen 1 Insuff. Switching" what the hell does all that mean? i hear of people diabling the knock sensor...should i just have that done? if so where can i do that? thanks!!!

 

On the O2 sensor, check all terminals, connectors and the wiring.

 

aparently the O2 problem is fixed...now it's the knock sensor...wtf do i do with that? keep in mind i have lt headers and 3" exhaust...thanks

 

I get a KS low votage code now and then and don't know what to do about it either, but it's never turned on the SES light.

 

The knock sensor code is set when the PCM doesn't see the correct voltage on the circuit. Either the wire from the PCM is not supplying the correct voltage to the sensor, or the resistance of the sensor is out of range. Could be a bad wire, corroded connector, faulty ground on the sensor or damaged sensor.

 

so where is this pos sensor and do i really need it?

 

The knock sensor is located on the passenger side of the engine block, screwed into a water jacket. If you remove the starter, you should see it. It's about 2" in diameter, with a single wire going to it.

You need it because the car is designed to detect knock and pull timing to keep you from blowing the engine. If you remove or disable it's ability to detect it, then you have to hope like hell that your tune is dead on, or you're likely on borrowed time.

 

Not trying to create any conflicts, but it mentions in his sig. that he has a 98 which is equipped with an LS1. I thought the LS1 had two knock sensors and they were located in the lifter valley area? Dont know if that would make any difference or not.