Torque Pro has a predefined set of pids
for GM that may be useful?

Menu>Settings>Manage Extra Sensors/PIDs

Menu>Add predefined set…

Doing this from memory so my wording
may be a little off.

Once added you can:

Edit the desired pid to test for a response.

If successful go back to realtime dashboard
to add using its longname.

Same problem here. I can connect with the odb2 ELM327 2.1 Mini adapter ISO15765-4 CAN11/500 via Bluetooth and it shows a lot of info ie coolant temp, oil pressure, rpm but no trans temp, trans oil temp, oil temp, outside air temp. I’ve done all the things already mentioned. The pids in Torque Pro show but say no data returned as well as in the Torque Scan addin.

I have a late model Impala so you’d think the sensors are there.

Do some ODB2 adapters only return basic data thru Torque Pro ie. coolant temp, oil pressure etc and not the other temps? If so, what can we look for in an adapter that will report all these pids so we won’t keep buying ones that only work half way?

Is it possible the extra Pids are turned off in the ECU or are they always available to report?

Thanks

Hi

If your manufacturer doesn’t support the generic transmission temperature PIDs, then you’ll need to look for the Mode 21, or Mode 22 PIDs specific for your manufacturer (each manufacturer has it’s own definitions for mode 21,22)

This will include:

PID
Equation
Units
and a header, if it’s relevant

So you’ll look for something like:

PID: 221234
Equation: A+(B*255)+C+D+E
Units: Deg.C
Header: 7E8

But obviously this will be different for each manufacturer.

You can then enter this in the ‘Manage extra PIDs/Sensors’ part of the settings. Once you add a sensor, it will then become available in the main list of sensors when you add a display in the ‘Realtime Information’ screen (it will usually highlight green when receiving data)

The PIDs are adapter agnostic

Just read a post on LS1tech/com that said the PID was:

221940

Do I just search for that somewhere in the APP, or do I still have to figure out the other info you list above?

Joe

What protocol does your vehicle use?

(Torque actually has two extended pids
for TFT using different headers).

Look under adapter status icon functions
while connected to see protocol in use.

It makes a difference as to what header
to use.

Hello,

I see these posts all over the internet that the GM Trans Fluid Temp doesn’t work and the responses are all the same, need to add the correct custom pid. We’re talking about GM Cars, not some obscure car only a handful of people own. Torque Pro doesn’t work with a Chevy Impala, a car that been around since the 60’s?

At least going back to 2014, Torque Pro has the GM PID’s included. You can see them in the custom pid section. You can add a gauge and find the ones there for the trans fluid temp. Don’t need to add anything. There 2 of them. Trans fluid temp method 1 & 2 221940 Equation A-40 for both method 1 & 2. One has Header Auto & the other has 7E2. This is the same settings everyone always says to set a custom pid to even though they’re already included. You can clear the list of custom pids then re-add the GM ones and the same ones are put back.

Either the Torque Pro app can’t handle GM cars for this even though they list 2 PID’s for them or something doesn’t work with the OdB2 adapters which seems most of them are clones and is difficult to find a real one.

The reason the trans fluid temp is important for GM cars is you can’t check the fluid level any more even though there s stick for it in the later models. The owners manual says need to take it to the dealer as it’s too complicated for the avg person. It’s filled from the factory and unless it’s leaking, doesn’t need to be checked. If you want to change the fluid how do you know how much to fill it. You can only fill it to the proper level if the fluid is the correct temp and the only way you can find that is with either an ODB2 scanner that reports it or the 4000 dollar diag meter the dealership has. I think the owner of the car/truck should be able to change their own trans fluid if they want especially since the newer ones have a drain plug making it easier then dropping the pan.

Hi!

GM use several types of transmission systems in their vehicles and have also been known to use transmissions built by Toyota

Some transmission systems in GMs wont respond to PIDs until the vehicle is out of neutral and in drive. This may be why you are not getting a reading.

It also depends on whether or not GM have enabled access to the PID in your country (f you’re outside the EU/US, then it’s possible that the PID has been disabled)

There are 3 PIDs for transmission temperature in the app. 2 GM ones that have been used on GM vehicles, and a more generic one in the ‘Other’ set of predefined PIDs that may work if your transmission supports it (or may just report coolant temperature).

If you have a more recent GM vehicle, then it may be that the PIDs have been changed again. This means that the transmission temperature PID will have to be searched for again if none of the existing ones work for your vehicle

The best place to ask on a GM specific forum to see if anyone knows the PIDs for your make/model/year of vehicle if the existing PIDs in the app don’t work for your specific make. Unfortunately manufacturers do not put this information in the public domain so it has to be worked out, which does take time

Quote from jozw30 on September 26, 2016
Not sure what your point is. I have added the GM PIDs from the custom menu (tried both). They load, I add a gauge, start the car and nothing happens……..

I have seen all of the posts too, no solution except that some claim that it actually worked for them.

As you said, either the app just doesn’t work or the GM trans doesn’t report temperature data…….

I guess if you can’t get a solution on the forum for the product itself, likely not going to find one.

I don’t think it’s the trans reporting the temp as the engine oil temp and outside air temp also doesn’t work. The trans oil temp has to report the temp as anyone working on the trans needs the temp to set the correct fluid level.

I put a different post out there asking for what adapters people have that actually get the trans oil temp for later model gm’s. I still think Torque should do this as they’re selling a product.

That’s great! I will try to do that later today.

Thank you!