Error Code after high flow cats
04-21-2010, 01:51 PM
#11
6th Gear Member
Join Date: Jul 2007
Location: Honolulu, HI
Posts: 6,130
sometimes even going to hiflow cats will still give you the CEL like you have no cats.
get a tune that shuts off you rear O2 sensors and you'll be golden.
04-21-2010, 01:57 PM
#12
5th Gear Member
Join Date: May 2007
Location: Central Texas
Posts: 2,388
You can't just get the rear sensors turned off if you have to go through emissions checking during inspection. They'll have to be in and appear to be "functional".
Zero, the code is telling you that the driver side front sensor is not producing any signal voltage. Check to make sure the green connector or any of the wiring did not get damaged. With this code, I would expect a cut or burned wire, or the sensor itself is bad.
You could swap the front sensors and see if the code changes to bank 1, then you'd know if the sensor is bad.
Rear sensors and cats, present or not and regardless of the tune, should NOT cause this code, if the code is correct and is indeed bank 2 sensor 1.
Zero, the code is telling you that the driver side front sensor is not producing any signal voltage. Check to make sure the green connector or any of the wiring did not get damaged. With this code, I would expect a cut or burned wire, or the sensor itself is bad.
You could swap the front sensors and see if the code changes to bank 1, then you'd know if the sensor is bad.
Rear sensors and cats, present or not and regardless of the tune, should NOT cause this code, if the code is correct and is indeed bank 2 sensor 1.
04-21-2010, 02:07 PM
#13
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
Posts: 13,090
I installed Magnaflow high flow cats today and got two error messages.
P1000 OBD systems readiness test not complete
P2197 O2 sensor signal stuck lean Bank 2 sensor 1
I didn't even touch that sensor. Is this at all normal I thought having high flows wouldn't mess with the O2 sensors?
Any help would be appreciated.
P1000 OBD systems readiness test not complete
P2197 O2 sensor signal stuck lean Bank 2 sensor 1
I didn't even touch that sensor. Is this at all normal I thought having high flows wouldn't mess with the O2 sensors?
Any help would be appreciated.
Lean would make sense because with less back pressure the exhaust is moving faster (higher volume of air) so the computer is out of trim (adjustment) from what was previuosly being read and became expected. the light will go out on its own or pop back up immediately after reset if there is a real problem.
04-21-2010, 02:43 PM
#14
5th Gear Member
Join Date: May 2007
Location: Central Texas
Posts: 2,388
Clear the DTCs or disconnect the battery for 20 minutes to clear the codes. And doing a change such as what was done, doing this first is not a bad idea, unless the battery was already disconnected during cat removal.
It's possible the removal of cats could affect the fuel trims, a little. But one side would not be stuck lean (meaning, the PCM is reading 5 volts from the signal-side of the sensor; since the PCM provides that 5v, it would make sense that either the circuit is open between the PCM and O2 sensor, or the O2 sensor is open internally. 0V would be stuck rich, and likely a short or bad sensor.).
It's possible the removal of cats could affect the fuel trims, a little. But one side would not be stuck lean (meaning, the PCM is reading 5 volts from the signal-side of the sensor; since the PCM provides that 5v, it would make sense that either the circuit is open between the PCM and O2 sensor, or the O2 sensor is open internally. 0V would be stuck rich, and likely a short or bad sensor.).
04-21-2010, 04:28 PM
#15
2nd Gear Member
Thread Starter
Join Date: Jan 2007
Location: Ohio
Posts: 190
Thanks for all the help.I am going to have to check on it this weekend.
I do have a C&L street intake with Diablosport tuner and SLP loudmouths. I have cleared the codes with the turner but after a second start up they come back. I have 43,xxx miles on the car. I had a trusted shop do the work since I could not get the cats to loosen from the manifolds.
I do have a C&L street intake with Diablosport tuner and SLP loudmouths. I have cleared the codes with the turner but after a second start up they come back. I have 43,xxx miles on the car. I had a trusted shop do the work since I could not get the cats to loosen from the manifolds.
07-19-2010, 01:05 PM
#19
2nd Gear Member
Join Date: Jul 2010
Location: Texas
Posts: 159
the ECU is looking at the O2 sensors after the cats to make sure that they're still there and working it's the manufacturer's way to try and stop people from removing cats.
you can either get a tune that ignores the fact that the cats aren't there or get the spark plug fouler things to space out the O2's from the exhaust. that usually works, worked on my buddy's car. if you already have a tune with free lifetime updates then just get a new tune, otherwise do the fouler mod
here's a walk through on the foulers, different car, same concept...
http://forums.evolutionm.net/evo-how...ouler-how.html
it's the manufacturer's way to try and stop people from removing cats.you can either get a tune that ignores the fact that the cats aren't there or get the spark plug fouler things to space out the O2's from the exhaust. that usually works, worked on my buddy's car. if you already have a tune with free lifetime updates then just get a new tune, otherwise do the fouler mod
here's a walk through on the foulers, different car, same concept...
http://forums.evolutionm.net/evo-how...ouler-how.html
so just out of curiosity. has anyone done this on a mustang?? Thats from an Evo site. I would like to get an X pipe. Thought about high flow cats...but the price compared to an o/r x pipe makes me think differently. If this trick REALLY works and I dont have to tune or redo anything to pass emissions every year then Ill gladly go this route with the O/R
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