Ranger Mods

So after about 2 months, 120 odd hours of working on this I have found the undocumented PID for the exhaust manifold EGT sensor. I still need to do further testing on the calculations as I'm currently viewing raw data but this pic is the real teaser!

This will work on non DPF and DPF model vehicles, Everest and Ranger.

Click to enlarge

Excellent news.


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I'm thinking this is pretty close, if not spot on. Want to pull some more data first.

Ignition on, vehicle not running and approx 20 degrees ambient temperature.
EGT 25 degrees, Intercooler 20 degrees, SOC 72% and AMP In/Out -10

Engine Idleing
SOC maybe a glitch or it's possibly the alternator does not cut in until certain conditions are met.

Engine running with some higher revs

Engine running at high idle 900 RPM, vehicle is cold


Also thank you Richard for the acknowledgement, much appreciated. Once I do my final testing I will flick you through the details to try first. Over and out, final results not until next week. I want to pull the sensor and test my calculations with the sensor in different temperature water.

Thanks Stewart, I assume by the title, this sensor is in the manifold, i.e. before turbo and DPF. For the PID mentioned in viewtopic.php?f=18&t=30 is that sensor before or after the DPF? If you have a DPF like me, is it worth monitoring both sensors or is one sufficient?

Thanks
Richard

ooh Nice effort!

Very interesting, I have one of those RedArc three in one gauges, Boost pressure, EGT and digital oil pressure.
The boost pressure indicates that my upgraded PX1 turbo runs at around 5 psi at idle (750 rpm) and up to 28 at full song up Lapstone Hill, I'm told by HPF who supplied and fitted the turbo however that this pressure is electronically reduced at the inlet manifold thingy by the ECU to around 22psi.
The oil pressure varies from 30 to 50 psi depending on the engine revs and oil demand.
Now, the EGT is a doozy, I had a Roo Systems "Legendex" 3" ceramic coated exhaust along with a Plasmaman "Pro" intercooler fitted in the Wildtrak from new, the original hot and cold hoses were replaced with Forefront Industries alloy pipes and the EGT gauge has seldom indicated a temperature over 300 degrees C.
The only time I can recall it actually getting onto the gauge scale was on the Hume Highway driving up a steep hill south of Yass while overtaking a line of semi trailers and B Doubles, on that occasion it went up to 425 degrees but fell almost immediately back off the scale (below 300 degrees) the moment I crested the hill.
From these temperatures I don't think that I'm ever going to experience high EGT ! My old Land Rover Discovery used to run at a fairly constant 450 degrees and would easily top 700 degrees driving up Mt Victoria and Lapstone Hill in the Blue Mountains, Garrett don't recommend EGT of over 750 degrees for more than 5 minutes as the exhaust vanes can distort.

Iainboyd wrote: ↑Sun May 06, 2018 9:38 am Very interesting, I have one of those RedArc three in one gauges, Boost pressure, EGT and digital oil pressure.
The boost pressure indicates that my upgraded PX1 turbo runs at around 5 psi at idle (750 rpm) and up to 28 at full song up Lapstone Hill, I'm told by HPF who supplied and fitted the turbo however that this pressure is electronically reduced at the inlet manifold thingy by the ECU to around 22psi.
The oil pressure varies from 30 to 50 psi depending on the engine revs and oil demand.
Now, the EGT is a doozy, I had a Roo Systems "Legendex" 3" ceramic coated exhaust along with a Plasmaman "Pro" intercooler fitted in the Wildtrak from new, the original hot and cold hoses were replaced with Forefront Industries alloy pipes and the EGT gauge has seldom indicated a temperature over 300 degrees C.

Is the EGT probe pre or post turbo? If pre, where exactly is it installed and what is your idle temps?

And the result is;

Having spent the last few night going over it, the PID and the math is correct.

If you want to try it, I think you use Torque then it will be;

Torque
PID: 220543
Module: 7E0
Math: A-40

OBDlink
PID: 0543
Module: 7E0
Math: A-40
Mode: 22

Scangauge
TXD: 07E0220543
RXF: 046205050643
RXD: 3008
MTH: 00010001FFD8

Ultragauge
TDATA: 07E02205430000
TCTRL: 93 RCTRL: 31
RPOS: 2008 MTCH: 620543
X: 0001 /: 0001 +: FFD8
OUT: 00 AVE: 00
L/R: 30

Now, we do have a problem. I believe this sensor is only there to tell the PCM that the vehicle has started and then looks for a predetermined figure which is unknown, to then allow the EGR to do its job.

The returned data is only 1 byte, I confirmed this over and over. When the engine is cold, the intercooler, outside air temperature and the manifold EGT are all withing 1 degrees of each other so I'm more than happy with my maths and it is common math for most temp sensors.

When idling it will be around 135 degrees before going for a drive but after a run can sit a bit higher than that. Problem is 1 byte can only go to HEX "FF" so 255 -40 can only be a max temp of 215 degrees.

Next I pulled the plug on the sensor and the fault is an EGR temperature sensor circuit fault. Hence why I now believe the PCM is probably only looking for eg. 150 degrees before the EGR will work in full and why a higher figure is not needed by the PCM. Honestly it would not have taken them anymore effort to read the figure as a 2 byte value but for whatever reason they did not. Although some EGT PIDs do only use 1 byte the maths are different.

No amount of math changes will resolve that result the sensor hits hex FF once the temps hit 215 degrees, nothing can be done to stop that. It is what the PCM PID is showing so that is that. You cannot tell the PCM to give 2 bytes of data as the firmware in the PCM is programmed to give 1 byte.

End result is as soon as you start to drive and are not idling then you hit the 215 degrees pretty quick as the exhaust manifold temp is so much hotter than the temps in the exhaust, I did not even see this max out until the weekend and once I worked out what was going on I was not happy.

So this is resolved, closed and done, for a PX2 or Everest anyway. Ford use the sensor for a purpose that is intended not to be monitored for a full temp curve. It was fun tracking it down and really getting to the bottom of it but if anyone asks from now on you can advise them that they are basically wasting there time on a PX2. I cannot confirm if the PX1 uses the same PID as I don't have one, I cannot confirm whether the PX1 even has this sensor, I also cannot confirm that the PX1 even if it has a sensor sends 1 or 2 bytes. If someone tries it on a PX1 and gets a result but want to see if a full temp curve is available then let me know.

Great effort stew, even if its not the result we all wanted at least we now know why its there in the first place.

You can see the location of the thermocouple probe, it is around 45mm long and allowing for the socket, adaptor etc. would be into the 75mm diameter exhaust dump pipe by some 20mm.

Thanks Iain, post turbo. I thought so with those temps.

Even though it will not read the whole range, we have added the PID into Forscan as EGR_EGT_TEMP. It should show in following Beta. The last beta also added additional EGT sensor PIDs, anyone that does not see them should delete their vehicle profile and do a full rescan of all modules.

saeb wrote: ↑Sun May 13, 2018 6:52 pm Thanks Iain, post turbo. I thought so with those temps.

Even though it will not read the whole range, we have added the PID into Forscan as EGR_EGT_TEMP. It should show in following Beta. The last beta also added additional EGT sensor PIDs, anyone that does not see them should delete their vehicle profile and do a full rescan of all modules.

Stewart,
For my part I'm not really interested in the post turbo readings, from past experience with my Disco 300Tdi if the post temp is below 300*C then the pre turbo wont be above 650*C so the titanium turbo blades wont distort and for my touring forays in the desert --- and with the concern about causing grass fires with knee deep spinifex --- the post turbo temperature is the critical one for me to monitor. As it is my exhaust isnt getting anywhere near hot enough to do start a grass fire and thats what I was aiming for.

G'day Stewart,

Typing this from the banks of the Diamantina in Birdsville, first signal for about 5 days. Anyway, I can confirm that the get pre turbo maxes out at 215 degrees on my scangauge.

Heading off into the desert tomorrow so off air again for a week or so.

Cheers

GerryP wrote: ↑Mon May 14, 2018 8:56 pm G'day Stewart,

Typing this from the banks of the Diamantina in Birdsville, first signal for about 5 days. Anyway, I can confirm that the get pre turbo maxes out at 215 degrees on my scangauge.

Heading off into the desert tomorrow so off air again for a week or so.

Cheers

Thanks Gerry, it's nice to know you had the same outcome on the 2017. Well good and bad.

Enjoy your trip mate, hope everything is travelling well.

I'm currently on Motorcraft and can confirm this sensor is called a EGRT sensor "EGR Temperature Sensor" which is located on the exhaust manifold near the engine. This is the first time I have found any notations on this sensor and was written on a SSM - Special Service Message for some EGT documentation.

I will post the whole lot up when I do the TSB's and SSM's later in the month.

Hi Stewart

I have been checking the same sensor EGR EGT and it is limited to 215 as you say, (2018 PX2) what i would like to know can we trick the sensor to read a lower temp and thus not operate the EGR valve? Could I simply remove the probe and leave in the engine bay which would provide a reading and not fault?

If we could do in Forscan would be better than a tuners solution which is harder to check.

I assume there is some timer that counts down after engine start to monitor the EGR if so surely we could reset automatically to eliminate any faults

I really want to stop the EGR valve operation it will kill the realibility of the engine over time either from build up in the engine or the cooler failing as many do.

Think I have worked this out.

I have another PID which is a 2 byte value and pretty precise. This may or may not apply to post DPF so will need to be tested.

Please post feedback on values as it is still work in progress.

Torque
PID: 220569
Module: 7E0
Math: ((A*256)+B)/32

OBDlink
PID: 0569
Module: 7E0
Math: ((A*256)+B)/32
Mode: 22

Scangauge
TXD: 07E0220569
RXF: 046205050669
RXD: 3010
MTH: 000100200000

Ultragauge
TDATA: 07E02205690000
TCTRL: 93 RCTRL: 31
RPOS: 2010 MTCH: 620569
X: 0001 /: 0020 +: 0000
OUT: 00 AVE: 00
L/R: 00

At 26c engine temp mine shows 117 - 119 at idle.
At 1400 revs it shows 148c.
At 2000 revs shows 181c.

Thanks Rick.

Whichever way calcs are good and confirmed.

Cannot believe anyone else has tried it!!

I have a 2016 Ranger and have a scangauge i put the code in for the EGT and it works great,thanks

saeb wrote: ↑Sun Aug 18, 2019 9:35 pm Think I have worked this out.

I have another PID which is a 2 byte value and pretty precise. This may or may not apply to post DPF so will need to be tested.

Please post feedback on values as it is still work in progress.

Scangauge
TXD: 07E0220569
RXF: 046205050669
RXD: 3010
MTH: 000100200000

Unfortunately I don’t get a reading for the Scangauge II on a May 2015 built PX 1. Still using a cheapo LED pyro gauge post turbo on standard exhaust with deleted CAT, oversized tyres all up a 2.80 tonne rig with a tow tune and can get the temps to 450 c. easily.
Have ordered the Plasmaman intercooler and due to mileage may upgrade the turbo as I have only just put a new crate motor, injectors, radiator, water pump and injector pump in due to holing piston 3 due to a possible faulty injector or diesel.

Arwon wrote: ↑Fri Feb 21, 2020 7:56 am

saeb wrote: ↑Sun Aug 18, 2019 9:35 pm Think I have worked this out.

I have another PID which is a 2 byte value and pretty precise. This may or may not apply to post DPF so will need to be tested.

Please post feedback on values as it is still work in progress.

Scangauge
TXD: 07E0220569
RXF: 046205050669
RXD: 3010
MTH: 000100200000

Unfortunately I don’t get a reading for the Scangauge II on a May 2015 built PX 1. Still using a cheapo LED pyro gauge post turbo on standard exhaust with deleted CAT, oversized tyres all up a 2.80 tonne rig with a tow tune and can get the temps to 450 c. easily.
Have ordered the Plasmaman intercooler and due to mileage may upgrade the turbo as I have only just put a new crate motor, injectors, radiator, water pump and injector pump in due to holing piston 3 due to a possible faulty injector or diesel.

Because a PX1 does not have the sensor. Can't read something that does not exist.