02 sensors and evap will not go ready.

Chris Sparks

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My 2008 mustang gt o2 sensors and evap will not go ready for the NJ emissions test!.I tried to go thru the state inspection and it failed to pass just after I registered it.The next day my smart /SJB went bad and taken care of from a local Ford dealer it probably was from the heavy rains that we had and very costly from an earlier thread that I got some responses from!.That part is fixed but the car has Flowserve exhaust and headers.The previous owner had past it in maryland state emissions but I have tried everything that I had heard of from blocking off the one side of the exhaust and driving over 80 miles to switching to other side of the exhaust and driving several more miles with a 3 inch width pvc pipe and running premium fuel 93 octane and blocking most of the air filter high flow with saren wrap another person said they try it with there 2008 gt and took care of it!.The battery idle no start 12.7 volt running 13.4 volts seems pretty good as could be an issue by other people but I don't think it is it?.Do I have to take to custom tune speed shop to get rectified.I checked it with my scan tool the 02 sensors pass but still not ready in the car's computer.Any answers.
 

stkjock

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The owners manual has a very specific drive cycle to reset all monitors. It solves this issue 99% of the time if the O2s are on and in working order

if u don’t have a Manual search the net, it’s out there
 

sman247

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Which part exactly did it fail in the inspection? The o2 sensors? If you have a tune currently I would make sure your rear o2 aren’t shut off. A lot of tuners do that and in the strict states like you in NJ and me in MA it will fail cause of it
 

Chris Sparks

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It tells me on my scanner that the O2 heaters and the O2 sensors are not ready and also the evap is not ready.I tried driving in different conditions Highway probably 120 miles round trip and city driving about 30 miles in total for two days and I was not a light foot in driving and was mostly on highway today on cruse control.I changed the battery about a year ago and the 02 sensor scanned because the check engine light came on for that and once it was changed and cleared it about 300 miles ago with no check engine but getting what I am having right now.I tried close to what the ford manual said. I don't know if when I bought the car about a year ago with a dead battery if it lost it's tune when the car was sitting for about a year not being used. Very frustrating
 

stkjock

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They don’t lose the tune.
Do the driving cycle per the manual
 

Laga

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They don’t lose the tune.
Do the driving cycle per the manual
Correct! And make sure you do it exactly like described. IIRC, you have to drive approximately 5 miles at 60mph. I tried a couple of times going 70-75 because that’s what traffic was doing. It wasn’t until I drove the miles right at 60, that my readiness monitors came back on.
 

Juice

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Just to be sure: scan tool shows 8 monitors and 3 are incomplete?
Car has a tune on it?
 

GlassTop09

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It tells me on my scanner that the O2 heaters and the O2 sensors are not ready and also the evap is not ready.I tried driving in different conditions Highway probably 120 miles round trip and city driving about 30 miles in total for two days and I was not a light foot in driving and was mostly on highway today on cruse control.I changed the battery about a year ago and the 02 sensor scanned because the check engine light came on for that and once it was changed and cleared it about 300 miles ago with no check engine but getting what I am having right now.I tried close to what the ford manual said. I don't know if when I bought the car about a year ago with a dead battery if it lost it's tune when the car was sitting for about a year not being used. Very frustrating
Here ya go.....................
 

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Chris Sparks

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Well I tried the ford drive cycle yesterday some good news the evap is ready but the 02's are not.I have to put in more fuel and get it above 3/4 tank and try it again hopefully the next round of driving will make the 02's ready.Tks for the input!
 

Juice

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Well I tried the ford drive cycle yesterday some good news the evap is ready but the 02's are not.I have to put in more fuel and get it above 3/4 tank and try it again hopefully the next round of driving will make the 02's ready.Tks for the input!
Fuel level is only for the evap.
O2 and O2 heater monitors were always a bitch to set for me. Yea, I know, I have a coyote and not a 3v. Those monitors always set last for me. Driving on a 2 lane backroad where you do not hold a steady speed and under 55-60mph is where I always see those complete.
 

GlassTop09

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Here ya go..........................

Provided below is the official FoMoCo OBDII Summary for 2008 MY vehicles (which covers your Mustang). Read thru pgs 48-60 as these pages discuss the HO2S sensor's several monitor checks that they have to pass before they show as OBDII complete. There is some sequencing w\ some of these monitors that have to pass before the next 1 will start along w\ meeting min-max operational entry conditions before the monitor will be initiated. I suspect that there's something going on that is preventing the monitors from running. If you don't have any DTC's (either pending--no MIL light or set--MIL light) then there's something that is preventing the monitors from either running or completing (in order to set off a HO2S DTC the HO2S failures have to => 30 tries) so yes it can take a while depending on how you are going about driving the car thruout the drive cycle process AND\OR if there is some unknown\unforseen operational condition existing that is preventing 1 or more of the HO2S monitors from running........not necessarily the HO2S sensor(s) being defective.........

In my experience using the FoMoCo drive cycle procedure I sent earlier I have consistently completed HO2S sensor monitors (as well as all the rest w\ the exception of the EVAP monitor & the 60-40 DFCO Misfire Monitor) for OBDII within 18-50 mi of driving on my '09 Stang so this is why I suspect there's more going on..............

You will note that the very 1st HO2S monitor that has to pass\complete before any of the rest can run is the HO2S heater circuit test so if these don't complete the others will not even start up so focus on the HO2S heaters 1st............then proceed down the line.

If you do end up having to replace any O2 sensors themselves IMHO the smart thing to do is to replace w\ either NTK 22060\22500 or OEM Ford F85F-9G444-BD (made by BOSCH) O2 sensors.....neither are cheap but you'll have the least issues\best operational performance from either as the Spanish Oaks PCM when running it's O2 sensor tests are looking for the rated signal voltage specs that are in line w\ these specific O2 sensors. These are the thimble designed O2 sensors that fully meet the FoMoCo O2 sensor voltage specs........

But test to make sure that the O2 sensor heater circuits are actually bad in the sensors themselves before you look into replacement as the issue may be elsewhere.

You don't have to take my word on any of this.......just read the summary provided below then follow up.

Hope this helps.
 

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Chris Sparks

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I tried the second Ford drive cycle and I am still getting the o2 sensors and 02 heaters are not ready and I drove it probably about 60 miles yesterday on the highway on cruise control not going above 70 mph and minimize the fuel slosh and going above 40 mph on the open roads and fuel gauge between 1/2 to 3/4 full.Still no dice and driven it for 500 miles since putting back on the road.I have pretty much have given up and tried the one Ford drive cycle it a couple of time idling 4 minutes cruising down the development for at least 40 seconds running 1/4 to 1/2 trotle at 45 mph in second gear manual transmission for at least 20 seconds and shifting to fifth gear for at least 15 seconds three times yesterday.I am to the point of either having Ford look at it and or speed shop alot of fuel and time wasted!.The only couple things rectified was the evap is ready and pretty much the rear end wine is gone!.I don't how it past the Maryland state emissions inspection two years ago before he took it off the road!.I am going to try to get hold of him the previous owner.
 

Chris Sparks

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Also I know it is running Bosch o2 sensors because the Ford ones wire lengths were too short and is identical to what I pulled out it part number wise when I replaced the one 02 sensor three months because on the check engine light was on for it and no lights since because when it came on the chk engine came on and tried to reset it three times just after three block of driving I pulled it the 02 sensor and replaced it and reset it !.
 

Juice

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Try to find a back road where you have to drive between 40-60 miles an hour. I think the varying speed helps those monitors, vs a steady cruise.
 

TexasBlownV8

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If after all your drive cycle attempts and the rear sensors are still not ready, they are likely turned off in the tune, and nothing you do will make them come up ready, except for a tune to turn them on. Since the heaters are not reading, they are likely off, or, not registering at all to the PCM. ..and these are the rear sensors we're talking about (bank 1 sensor 2, and bank 2 sensor 2).
 

Juice

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If after all your drive cycle attempts and the rear sensors are still not ready, they are likely turned off in the tune, and nothing you do will make them come up ready, except for a tune to turn them on. Since the heaters are not reading, they are likely off, or, not registering at all to the PCM. ..and these are the rear sensors we're talking about (bank 1 sensor 2, and bank 2 sensor 2).
If the catalyst monitor completed, the rear sensor must be turned on.
 

Laga

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Are there anti-flower extensions on the rear O2 sensors? If not, they are turned off.
 

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