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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Ford ethanol percentage

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Author	Topic: Ford ethanol percentage

tbird635

Member
Posts: 15

Ford ethanol E85 sensor percentage in hz? correct PID?
on: December 3, 2015 (GMT)

I was wondering if the percent of ethanol in the fuel from older Fords with a flex fuel sensor is able to be read?
It’s similar to the GM sensors but I’m sure has a different PID.

I tried the one available already and it never changes, despite filling the tank with e85.

The sensor works by outputting a frequency
The ford sensor seems to be
50hz=0% ethanol,
125hz = 100% ethanol.

I did find this article on PIDs also.
http://obdcon.sourceforge.net/2010/06/obd-ii-pids/

Thanks for any help

Capp777

Member
Posts: 2997

Re: Ford ethanol percentage
on: December 3, 2015 (GMT)

You might try googling “ford pids flex fuel sensor”
for a possible pid to test.

If a response comes back successful then use a
percent type equation?

((A*256)+B)*(100/65535)

tbird635

Member
Posts: 15

Re: Ford ethanol percentage
on: December 4, 2015 (GMT)

I did manage to find a few things already but no combination seems to work.

Edit: found this, will test it…
seems to be :

FF 16AB Flex Fuel Sensor Input %

equation seems to be A*100/255
.

Capp777

Member
Posts: 2997

Re: Ford ethanol percentage
on: December 4, 2015 (GMT)

I would try 2216AB…

The response is key to the equation
one byte or two.

tbird635

Member
Posts: 15

Re: Ford ethanol percentage
on: September 18, 2018 (GMT)

Anyone ever figure this out? I never did.
I know there’s a PID for this because the factory scan tool can read the percentage/hz .

How does the Torque Scan PID scanner work? I last tried it and it took an hour and produced nothing.

Capp777

Member
Posts: 2997

Re: Ford ethanol percentage
on: September 19, 2018 (GMT)

Assuming your vehicle uses PWM…

Please test raw hex response to the
following:

Long Name: Ethanol %
Short Name: Ethanol %
Mode/PID: 2216AB
Header: C410F1
Equation: A*(100/255)
Units: %
Min: 0.0
Max: 100.0
Scale: x1
Diagnostic Start/Stop Commands: Leave blank.

Post hex response.

Wiki also suggests…

Mode/PID: 0152
Header: Auto

which is included in Torque Pro
as Ethanol Fuel %.

tbird635

Member
Posts: 15

Re: Ford ethanol percentage
on: September 19, 2018 (GMT)

I have Torque Pro and the PID 0152 didn’t work.

I’ll try what you suggested for the raw hex response and let you know.

Thanks for your help !

tbird635

Member
Posts: 15

Re: Ford ethanol percentage
on: September 19, 2018 (GMT)

testing PID:

Result for equation 0.0
command 2216ab

response
6216ab0076

Variables used in equation a=0

equation steps
=A*(100/255)
=A=0.39215686274509

Judging by the response, I got a hex value of 76?
That converts to 118hz, am I correct?

I do have a tankful of e85 in it.
115 hz should be 85% ethanol

Making progress Thanks !

Capp777

Member
Posts: 2997

Re: Ford ethanol percentage
on: September 20, 2018 (GMT)

If you think its reporting Hz instead of %
set the equation to…

((A*256)+B)

and units to Hz.

(((A*256)+B)*1.307692308)-65.38461538 for % ?

tbird635

Member
Posts: 15

Re: Ford ethanol percentage
on: September 20, 2018 (GMT)

Ok will try that .

Thanks a lot for your help I was lost on this without it.

tbird635

Member
Posts: 15

Re: Ford ethanol percentage
on: October 4, 2018 (GMT)

Quote from tbird635 on October 4, 2018

Quote from Capp777 on September 20, 2018
If you think its reporting Hz instead of %
set the equation to...

((A*256)+B)

and units to Hz.

(((A*256)+B)*1.307692308)-65.38461538 for % ?
[/b}

——————————————

This worked perfectly! I put Gasoline in it and watched the percentage of Ethanol drop proportionately to what I put in.
Both equations work spot on.

Hz output is correct and percentage works great .

Cap777 you really know your stuff. Thanks for all your help.

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