[JASonic]

I've had the LTs on for 2 days now. When I first brought it home, I had to use the xcal to shut the rear O2 sensors off. When I did that, the check engine light went off and everything was fine.

I just went to Burger King and when I pulled out of the drive, I gunned it. The check engine light came back on. WTF?

Any idea's since I just had the headers installed? Is there something common I can look at. I mean, once I use the xcal to shut the O2's off, they can't "turn" themselves back on causing a CEL can they? Any ideas on what might be up?

Thanks!

[whitemustang02]

i donno, i could be something completely not even related to the headers. i would try and see what code it is throwing.

[AtlanticBlue99]

What code(s) is(are) it throwing? Did you turn off the O2 sensors or did you just clear the DTC's?

[JASonic]

I ran the xcal and pulled the DTC's. There were 2 codes.

P2195
P2197

I had my brother look them up in his little Green Lantern decoder book and he said it was " model specific" or some shit.

I googled it and it said some crap about the O2 sensor running lean. I can only assume its a code thats being thrown form the fron sensors since I dont have rear sensors anymore. Im confused.

AB- Thanks....I did turn them off (the sensors). But, I never cleared the code. After I programmed it 2 days ago I restarted the car and the CEL was off. I fiigured it corrected itself.

[JASonic]

I seen this on another site. Not to make for confusion but he's getting the same code.

2006 Mustang Trouble Code Problems - Ford Mustang Forums

[JASonic]

Stole this from another site. I cannot make sense of this. From what I can tell, I may have an exhaust leak near my sensor. Being that I just had these headers installed this may make sense. Maybe I just need them to "tighten" them down a bit now that Ive driven a few days?
---------------------------------------------------------------------------


Originally Posted by LaserRed01GT
My Alldata says this:

P2197 - Lack of switching, sensor indicates lean, Bank 2

The time between HO2S switches is monitored after vehicle startup and during closed loop fuel conditions. Excessive time between switches or no switches since startup indicate a malfunction. Since “lack of switching” malfunctions can be caused by HO2S sensor malfunctions or by shifts in the fuel system, DTCs are stored that provide additional information for the “lack of switching” malfunction. Different DTCs indicate whether the sensor was always indicates lean/disconnected (P1131 or P2195, P1151 or P2197), or always indicates rich (P1132 or P2196, P1152 or P2198).

In the event that the vehicle does not stall if the line between the intake manifold and PCV valve is inadvertently disconnected, the vehicle will have a large vacuum leak that will cause the vehicle to run lean at idle. This will illuminate the MIL after two consecutive driving cycles and will store one or more of the following codes: Lack of O2 sensor switches, Bank1 (P1131 or P2195), Lack of O2 sensor switches Bank 2 (P1151 or P2197), Fuel System Lean, Bank1 (P0171),, Fuel System Lean, Bank 2 (P0174).

It sounds to me like an extended lean condtion at idle on bank 2.

[JASonic]

Since I have P2195 and P2197, does that mean I have a malfunction in both banks one and two? Does this mean anything?

[GreenFaleen]

its from the ricirc valve, it gets stuck open, problem I had with mine too, clear codes do a hard reset, make sure rear 02's are off and it should take care of it

[JASonic]

Originally Posted by GreenFaleen its from the ricirc valve, it gets stuck open, problem I had with mine too, clear codes do a hard reset, make sure rear 02's are off and it should take care of it

Thank GF!

I need to ask now so I can learn. what is a ricirc valve? Is there something I can do so that it doesnt get stuck open? Does it need cleaned or replaced or something??? Thanks for any education.

[JASonic]

OK, could this be something else? Just curious to learn here. Running "lean" scares me with this. Might I need a custom tune now with the addition of these headers and lack of cats? I know this may sound stupid but could it be getting too much air now?

[xBIGxWHITEx]

i have an on going cel as well but mine is the fuel level sensor and i dont know how it got messed up cuz its in the tank and i tried restarting the sensor and unhooking the battery and whatever else and the light stays off for about a week then it comes back on. its pretty annoying.

and autozone said that only the dealership could fix it and i really dont want to pay there dang ridiculous prices.

any suggestions...ive also tried fuel system cleaner

[JASonic]

Originally Posted by xBIGxWHITEx i have an on going cel as well but mine is the fuel level sensor and i dont know how it got messed up cuz its in the tank and i tried restarting the sensor and unhooking the battery and whatever else and the light stays off for about a week then it comes back on. its pretty annoying. and autozone said that only the dealership could fix it and i really dont want to pay there dang ridiculous prices. any suggestions...ive also tried fuel system cleaner

I got nothin but love for ya xBIG but,,,,, DONT HIJACK MY THREAD!

[xBIGxWHITEx]

sorry dude i just figured they could give me a suggestion too lol... i didnt mean too

[JASonic]

Its cool brotha man! Set up a thread,,,there's some really smart guys here that have helped me with a ton of shit.

[xBIGxWHITEx]

just did

[Cricket]

Originally Posted by JASonic OK, could this be something else? Just curious to learn here. Running "lean" scares me with this. Might I need a custom tune now with the addition of these headers and lack of cats? I know this may sound stupid but could it be getting too much air now?

Since the o2 sensors are farther away, and also the pipes are a larger diameter it's not uncommon to get a lean code from LT headers. Nothing is really wrong. You really just need to shut them off or use some mil's. It's just that air has farther to go than it did before to reach the sensor and that air will be leaned out a little bit more. You don't need a custom tune, but hey I loved it once I got my car up on the dyno, and that tune is tons better than the canned tune I had before.

If it's not that it might that your o2 sensors are a little old, or what GF said.

[GreenFaleen]

the recirc valve (recirculating valve), is part of the EGR system it is what reintroduces exhaust into the intake, you can replace it, but its pointless since the O2 sensors if they read lean will just open it till it gets stuck open again, what happened was it got stuck open, you then turned off your rear o2's so it never was reset on the OBD2 reset, so turn the sensors back on, do a hard reset, turn them back off and you should be good to go,

and the lean code means nothing unless your missing as well

[Trick Tuners]

Originally Posted by Cricket You really just need to shut them off or use some mil's.

Its never a good idea to shut off the upstream o2s on any street car. BAD idea!! I typically adjust the tune for LTs and add in some more power for the heaters so the O2s work better. (I tweak a bunch of other crap too)

[Onemanzu]

i used to get that all the time... some seafoam and making sure that the O2s are tightened all the way. mine were lose and i didn't check that before i got new sensors. after i replaced them and tightened it down, haven't had the code back...

[JASonic]

Originally Posted by Trick Tuners Its never a good idea to shut off the upstream o2s on any street car. BAD idea!! I typically adjust the tune for LTs and add in some more power for the heaters so the O2s work better. (I tweak a bunch of other crap too)

So.... can you make a tune that will take full advantage of my set up now? I'm currently just using a canned Xcal3 tune. If I truley am running a bit lean because of the amount of flow Im getting, is there a way to adjust for it and maybe benefit from it?

Brenspeed said they would make a tune for me but he wanted me to drive it for another week to see if the CEL continues. I've already reset the sucker 2 times today and it just keeps coming back on. I dont think its missing or anything like that but its hard for me to tell. I know the idle was a bit rough at first but when I turned it up to 722 rpms, it got better.