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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » 2000 sierra commanded AFR

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Author Topic: 2000 sierra commanded AFR
SJ74
Member
Posts: 5
Post 2000 sierra commanded AFR
on: August 4, 2017 (GMT)

I have a 2000 GMC Sierra, I am trying to get the AFR commanded or would like a way to calculate the actual. I can get all of the other PID’s such as 02 voltages, MAF, MAP and so on. I have used torque scan and done the predefined set. I am using the Torque pro app.

Any help would be greatly appreciated.
Capp777
Member
Posts: 2993
Post Re: 2000 sierra commanded AFR
on: August 4, 2017 (GMT)

Are you saying the “Commanded Equivalence Ratio”
provided by Torque Pro does not work? This is a
standard OBDII pid.
SJ74
Member
Posts: 5
Post Re: 2000 sierra commanded AFR
on: August 5, 2017 (GMT)

Yes, I doesn’t work. It works on my 2005 Colorado.
SJ74
Member
Posts: 5
Post Re: 2000 sierra commanded AFR
on: August 5, 2017 (GMT)

I’m sorry I meant the [GM]AFR(Commanded) and the other AFR that is not a GM PID that is in the list of PIDs below the GM specific PIDs. I haven’t tried the equivilence ratio (Lambda)PID I will try that. Thanks.
SJ74
Member
Posts: 5
Post Re: 2000 sierra commanded AFR
on: August 5, 2017 (GMT)

So the “Commanded Equivalence Ratio” did not work either. I cleared all the PID,s and started over with the adding the predifined and then doing the torque scan which finished with no problems. Didn’t work. I do believe I have narrow band 02,s but I should be able to at least get the commanded AFR! Can I calculate lambda with the rest of the information?
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