The On-Board diagnostic codes are P0325 - Knock Senros 1 circuit malfunction (Bank 1 or Single Sensor)
and
P0136 - O2 Sensor circuit Malfunction (Bank 1 Sensor 2)

Are these generic errors? I have a G-force ecu, but no lights on the dash have ever come on? The car has the stock cat. This am was the first time since I have owned the car that it has had a problem. It was rather cold this morning and I cranked my car. Let it warm a few moments and began driving. The car had little to no power above 2000 rpm. I pulled over drove the car back home and let it idle in the garage for about 20 min. Then I went out and drove to work as usual. The car ran great. Also at lunch and on the way home from work It drove just fine. So I took it after work to have my emissions done. My birthday is next week.
These are the failures I got? I have passed before with my entire setup? Nothing has changed?
Could the G-force ecu be causing this, or can these be real errors with the O2 and Knock Sensors?
This is the first year they have plugged directly into my cars ECU for testing? Up until now they have tested the actual tail pipe and what the car actually put through the exhaust.
Thanks for any help.

 

By the way I never have seen a light come on while the car was cranked on my dash? It does completely light up when i half turn the key.
The fact that it ran so poorly yesterday for the first time and it failed the emissions that afternoon makes me think that it might have stored some bad info. Also I did run the car for several weeks with a straight pipe and no cat. once i realized the straight pipe was of no use I put the cat back on. This might have done something to the O2 sensor, but I would expect a light if something was wrong?

 

You just need to replace the o2 sensor. It think that the way or O2 sensors work is that they don't trip the CEL unless they are completely dead. Yours might be in the process of doing just that. Even if that I don't think that it should make you fail emissions.

 

Yea,

I think I will give it a week of driving and try again. If I fail I will get an o2 sensor. The knock sensor will be the last thing I change. It looks like a real pain to get to.

I wish I did not live in the city????

 

How did they check your car. Did they just plug in an OBD-II reader? or did they do the sniffer test

 

They plugged into the reader under the dash. This is the first time I have had this happen. The ususal method is the sniffer test. Apparently 1996 and up cars are now tested by plugging in.

I spoke with Jay25 and he thinks the Knock sensor might be the culprait. It might cause the o2 to also show up as bad?

I dont know, I do know the car runs fine and I have no lights on the dash to indicate a problem? The fact that it ran so poorly yesterday morning makes me a bit scared. It looks like that knock sensor is a real B"$&h to get to!.
May as well install a MEVI while I am at it because it looks like the Intake manifold will have to come off? O2 sensors could be bad. the Car has 130k on it, but still runs strong.I think I have 3 total O2 sensors, so I am not sure which one might need replacing?
Has anyone else ran into a problem like this and never seen a check engine light?