OBD2 Readiness Monitors with Tune

[Esha800HP]

At a loss with mine...

Whipple Stage 2 still on Whipple tune, catted LTH.

O2 and HO2 just don't want to set or go ready 5k miles later. Car hasn't had tags in over a year now. One Dyno tuner shop said I need new Oxygen Sensors, sure I replaced them, nothing, another shop said nothing I can do other than register the car outside the city, and Ford can't play with it, Whipple says it's because of LTH won't guarantee the monitors will set and they say it's not the tune.

Now, is there anyone out there that is running Whipple tune with long tubes and cats that are passing emissions without any kind of BS workaround like out of town address or oxygen sensor spacers? Because the amount of people that have this issue is sickening. And I'm just about sick

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[Wolfys11]

At a loss with mine...

Whipple Stage 2 still on Whipple tune, catted LTH.

O2 and HO2 just don't want to set or go ready 5k miles later. Car hasn't had tags in over a year now. One Dyno tuner shop said I need new Oxygen Sensors, sure I replaced them, nothing, another shop said nothing I can do other than register the car outside the city, and Ford can't play with it, Whipple says it's because of LTH won't guarantee the monitors will set and they say it's not the tune.

Now, is there anyone out there that is running Whipple tune with long tubes and cats that are passing emissions without any kind of BS workaround like out of town address or oxygen sensor spacers? Because the amount of people that have this issue is sickening. And I'm just about sick

Either your tuner force pass all emissions checks, or you have to run a spacer. Since your catted, a straight spacer should do the trick. In the offchance it doesnt, buy catted spacers. I run catless headers and never had a cel or issue inspecting with catted extensions. I dont see why you are against the spacers, you put them on and never touch them again, theyre post cat sensors, they dont effect the fuel trims at all, especially if your car thinks the car is operating under catted oxygen levels

 

[Esha800HP]

Either your tuner force pass all emissions checks, or you have to run a spacer. Since your catted, a straight spacer should do the trick. In the offchance it doesnt, buy catted spacers. I run catless headers and never had a cel or issue inspecting with catted extensions. I dont see why you are against the spacers, you put them on and never touch them again, theyre post cat sensors, they dont effect the fuel trims at all, especially if your car thinks the car is operating under catted oxygen levels

I have the spacers, tried them with and without the cats and monitors still won't go ready. I'm not against them by any means. Honestly I'd love to not use cats but since I've had this problem without the cats I've been trying to keep the setup as "legal" as possible to hope that those monitors turn on. But it seems like I need a workaround for this one. Any recommendation on catted spacers? Is this how you are getting by emissions? Or was a tuner able to help you force pass?

 

[Wolfys11]

I have the spacers, tried them with and without the cats and monitors still won't go ready. I'm not against them by any means. Honestly I'd love to not use cats but since I've had this problem without the cats I've been trying to keep the setup as "legal" as possible to hope that those monitors turn on. But it seems like I need a workaround for this one. Any recommendation on catted spacers? Is this how you are getting by emissions? Or was a tuner able to help you force pass?

I use spacers as alot of tuners wont force pass, and i use the spacers on multiple cars from different brands (mini, bmw) ive never had an issue

I used bigdaddiesgarage catted spacers, seem to be the most quality catted spacers for a decent price. I say try them, if they dont work, it may be something else, check your pre and post cat o2 sensors voltage as you drive, it can tell alot. Typically you need to be 3 different ranges, less than .2V, more than .8V, and between the range. If you dont hit all 3, it will not set o2 readiness

 

[Wolfys11]

At a loss with mine...

Whipple Stage 2 still on Whipple tune, catted LTH.

O2 and HO2 just don't want to set or go ready 5k miles later. Car hasn't had tags in over a year now. One Dyno tuner shop said I need new Oxygen Sensors, sure I replaced them, nothing, another shop said nothing I can do other than register the car outside the city, and Ford can't play with it, Whipple says it's because of LTH won't guarantee the monitors will set and they say it's not the tune.

Now, is there anyone out there that is running Whipple tune with long tubes and cats that are passing emissions without any kind of BS workaround like out of town address or oxygen sensor spacers? Because the amount of people that have this issue is sickening. And I'm just about sick

Did you replace all 4?
With what brand of oxygen sensor?

 

[Esha800HP]

Did you replace all 4?
With what brand of oxygen sensor?

I had originally replaced all 4 with TRQ sensors. But one of the Dyno shops said those are junk so I just bought Denso sensors that I'll be installing today.

 

[Wolfys11]

I had originally replaced all 4 with TRQ sensors. But one of the Dyno shops said those are junk so I just bought Denso sensors that I'll be installing today.

Always be careful of brands for important sensors like oxygen sensors- always strive for oem ford, or the manufacturer of the oem

Others often fail quick, or misread. Happened in my mini, sensor failed in 3 months from a bosch. My current ngk is a year strong now

 

[Cplennon17]

I'm catless headers with green cats and had this issue (Roush supercharger tho)

Replaced the downstream sensors (https://www.americanmuscle.com/mustang-o2-oxygen-sensor-set-downstream-osa61584.html), put the spacers on and did the drive cycle. It worked

https://www.mustang6g.com/forums/at... Monitor Bypass 13.,counter to increment to 2.

 

[Esha800HP]

I'm catless headers with green cats and had this issue (Roush supercharger tho)

Replaced the downstream sensors (https://www.americanmuscle.com/mustang-o2-oxygen-sensor-set-downstream-osa61584.html), put the spacers on and did the drive cycle. It worked

https://www.mustang6g.com/forums/attachments/2016-mustang-drive-cycle-pdf.796988/#:~:text=Stop for at least 20,shut off rear HO2S monitor.&text=EVAP Monitor Bypass 13.,counter to increment to 2.

Those are the same ones I bought! But apparently my local tuner said they are no good and recommended I buy Denso instead. When you say catless headers with green cats, are you saying you're catless completely? Or you have the green catted connection pipes? Kooks I assume?

 

[Cplennon17]

Texas speed LTH catless with Gesi G-sport ultra green cats

 

[Genxer]

If you can fit a tubular spacer with a 90 deg bend in it for the secondary O2 sensor, it will work better. At least it did on an import I owned. And point the bend upstream.

 

[Esha800HP]

***SOLVED***

Issue: O2 & HO2 monitors not ready

Alright, so my issue was fixed. And for anyone that's new to this thread I'll post my current setup below for reference.

2015 Mustang GT
Whipple Stage 2 Kit on Whipple Tune
Kooks LTH with Kooks Catted pipes
Corsa Extreme
Denso oxygen sensors
Oxygen sensor spacers (cheap ass ones from Shein I came across, 2 bucks, nothing fancy)

Picking up where I left off in this thread. Ended up getting Denso oxygen sensors recommended by local shop. Ran them for awhile, hundreds of miles, without any kind of spacers and no luck. Bought some cheap spacers online, slapped them on, hundreds of miles later with spacers, nothing. Gave up at this point. One day decided to go for a cruise to downtown (60 miles round trip all highway). Got home and checked the monitors for no apparent reason and O2 & HO2 sensors were green!! I about shot myself in the face from what I just saw. So maybe the steady highway cruising that day must have set them so idk (even though I spent over 1,000 miles on the highway already) But, it resolved, and I passed emissions. I put around 5,000 miles on the car since the Whipple install when this issue started. So the setup I have currently is working. Hopefully this helps someone in the future.

 

[Wolfys11]

***SOLVED***

Issue: O2 & HO2 monitors not ready

Alright, so my issue was fixed. And for anyone that's new to this thread I'll post my current setup below for reference.

2015 Mustang GT
Whipple Stage 2 Kit on Whipple Tune
Kooks LTH with Kooks Catted pipes
Corsa Extreme
Denso oxygen sensors
Oxygen sensor spacers (cheap ass ones from Shein I came across, 2 bucks, nothing fancy)

Picking up where I left off in this thread. Ended up getting Denso oxygen sensors recommended by local shop. Ran them for awhile, hundreds of miles, without any kind of spacers and no luck. Bought some cheap spacers online, slapped them on, hundreds of miles later with spacers, nothing. Gave up at this point. One day decided to go for a cruise to downtown (60 miles round trip all highway). Got home and checked the monitors for no apparent reason and O2 & HO2 sensors were green!! I about shot myself in the face from what I just saw. So maybe the steady highway cruising that day must have set them so idk (even though I spent over 1,000 miles on the highway already) But, it resolved, and I passed emissions. I put around 5,000 miles on the car since the Whipple install when this issue started. So the setup I have currently is working. Hopefully this helps someone in the future.

There are some driving conditions that have to be met in order to pass, you probably just havent hit those conditions

You can look up the conditions if you wanted

 

[5doorsoffury]

yea when i stocked out to get my car ready i left the headers on, catless w 90 degree spacers. went alllllll green in 50 miles over 2 days vs months on tune, revision,miles repeat. my origional tune was all green as well but i had 1500 miles on it when the tune got switched and thoes monitors went into my history on the tdn app. if i only knew what i know now i would of slapped that phone out of my hand and gotten the car inspected before saying good by to thes sext green monitors.

 

[Robottrainer]

I'm boosted and now stickers expired in PA - Im running Mak Cat Deletes also with Lund tune. They sent me a revised tune with o2 monitors turned on. Im about 500 miles in and still no cat-02-h02 monitors - Ordering the spacers recommended in another thread. I will report back hopefully with good news in a week or so

Watch your trims with spacers. FAOSC uses the rear sensors to calibrate the frontal as they age. spacers throw off the rears and your trims might start creeping rich.

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