97modifiedmustangGT

Well I have been waiting and waiting for my CEL to come on after I installed my o/r H about two weeks ago. So when I get home I run the code and I get a P0420 which is Catalyst Sys Efficiency Threshold (bank 1). Is that the normal?? I turned it off so my car should be running right, now? I also got a P1000 which is just it needs more driving time to check for more problems. Will I later get another code, cause it can also throw the same but in bank 2, whatever that means. What about a Catalyst Sys temp sens. What do all these mean? Basically that I have no cats LOL. Just wandering if these are the normal codes being thrown. Thanks

mylongvictor

You can turn the Light off but your computer will try to compensate for the lack of cats and you'll be runnin a lil rich..... Get some Mil Elliminators or use the tunner to "tell" the car that there is no cats on her.

97modifiedmustangGT

I don't think my tuner can tell it that there is no cats. I just have the ****ty superchips tuner (time for an X cal)All I can do is turn it off. I can tell that my car is running a lot richer since the new midpipe. I can't even clean the inside of my SLP tips, you know the double walled part, without it turning really black and that is just a day of driving. Is the only way to fix it by getting it dyno tuned?

97modifiedmustangGT

I was wondering if this was a little weird?? Today I threw the exact same code. I erased it yesterday but then got it again today. I erased it again today so we will see if I get it tomorrow.

Anyone got an answer how to lean out my car since it is running rich?

HOLLYWOOD99

P1000 is basically a code telling you that you cleared a code...

it will go away...give it time!

97modifiedmustangGT

No I was talking about the P0420. The P1000 is just a code saying it needs more time to check for codes

richinwa

Do you have the MIL eliminators hooked up?
The P1000 code means that it hasn't finished a drive cycle. Every time you clear the P0420 code you will delete any portion of the last drive cycle that you had stored, so you will be starting a new drive cycle. The fault code is not going to clear itself, or fix itself.

97modifiedmustangGT

I don't have MIL's. So are you saying that it will just come back all the time??

I thought people said to either get a tuner or MIL's??

richinwa

Are you kidding me? The rear o2's need somthing plugged into them. You see all the birds dropping as you pass them? That is from the free flow pipes. Kidding, I am no tree hugger but we should all attempt to do our part.
And no the codes will not clear themselves, they will keep coming up without the MIL eliminators.

97modifiedmustangGT

What are you talking about???!!! All my o2's are plugged in. I think you are getting confused