Transmission Fluid Temperature using a ScanGauge X-Gauge in a 2010 Alpha

[Alpha X]

Make your Trans Fluid Temp display in a 2010 H3T Alpha, using CANSF. The 2010 has the LH9 5.3L V8, 2009 has the LH8. If you go by what ScanGauge lists on their website, it won't work in an Alpha because I believe the code for the I-5. You might get it to read "32". That's not correct. Use the following data code. I also added Engine Oil Temperature and Engine Oil Pressure. Data codes below. If you have an UltraGauge, I've read you can translate these codes to work for you. This should work for H3 Alphas as well. I believe this also works for the Colorado & Canyon with V8 of same years.

Trans Fluid Temp - 2010 H3 & H3T Alpha
TXD: 07E2221940
RXF: 046205190640
RXD: 3008
MTH: 00090005FFD8

Trans Fluid Temp - 2008-2009 H3 & H3T Alpha (I found this in another thread)
TXD: 07E222194001 (this didn't work for me because of the last two digits 01)
RXF: 046205190640
RXD: 3008
MTH: 00090005FFD8

Engine Oil Pressure
TXD: 07E0221470 (2010 Alpha)
TXD: 07E022147001 (2008/2009 Alpha)
RXF: 046205140670
RXD: 3008
MTH: 001D00320000
NAM: EOP

Engine Oil Temperature
TXD: 07E0221154 (2010 Alpha)
TXD: 07E022115401 (2008/2009 Alpha)
RXF: 046205110654
RXD: 3008
MTH: 00090005FFD8
NAM: EOT

 

[Acer4LO]

THANK YOU THANK YOU THANK YOU!! Ever since got my Alpha my TFT temperature would not work. Do you know if this works on a 2008 Alpha though??

 

[Alpha X]

Oops.. see next post.

 

[Alpha X]

THANK YOU THANK YOU THANK YOU!! Ever since got my Alpha my TFT temperature would not work. Do you know if this works on a 2008 Alpha though??

From what I've learned in the past two days, the 2008+ use CANSF, so this should work. I believe the 2008 Alpha uses the LH8, so I'd try the 2009 LH8 code above first. Let me know if it works.

 

[Alpha X]

One more item to mention... If you type in the data code and it doesn't show values on the gauge, try turning the truck off. I let the ScanGauge turn off. Then I restart the truck, let it connect. See if it displays the temp after you restart with the data code previously entered in the X-Gauge.

 

[Acer4LO]

Yeah pretty sure it uses the LH8. But yeah thanks a million! I will be trying it sometime this week and I'll make another post if it works.

 

[JPaul]

Though I am pretty sure I've tried the oil pressure codes before, I'll give those a shot in my Ultragauge. Trans temp works great though. Not sure that the LH8 has oil temp though, did you get that to work?

 

[amrg]

The GM engine oil temp is a calculated parameter depending on engine load/rpm and ect. Its not super accurate but apparently its very close from the real thing (at least on the vettes/camaros).
One thing is that the engine oil temp spikes really high in heavy loads (above 250) and we dont have an engine oil cooler in our radiators like the other trucks/cars! I noticed I can be cruising at 190* and my engine oil temps at 225*!

 

[Alpha X]

Though I am pretty sure I've tried the oil pressure codes before, I'll give those a shot in my Ultragauge. Trans temp works great though. Not sure that the LH8 has oil temp though, did you get that to work?

Yes, I believe it’s working properly.

EOP shown below is in normal range at 32 psi
EOT at 203 degrees F
FWT at 209 degrees F (coolant temp)
TFT at 161 degrees F

I *believe* the the difference between the LH9 & LH8 is that the LH9 has VVT, where the LH8 doesn’t. Otherwise they are the same. I also *believe* they are both variations of the aluminum block LC9 full size truck engine, modified to fit the GMT345/355 engine bays. That being said, they should have the same functionality.

 

[JPaul]

Cool, I'll give them a shot this morning.

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[JPaul]

well, no luck on the oil pressure so far, it's going to take some tweaking to get it right. Haven't tried the oil temp yet. Interestingly my trans temp codes are slightly different from what was used in that other thread.

I'll compare what changes I had to make to the trans temp vs what you show here and see if there is a correlation with the oil pressure.

 

[Alpha X]

well, no luck on the oil pressure so far, it's going to take some tweaking to get it right. Haven't tried the oil temp yet. Interestingly my trans temp codes are slightly different from what was used in that other thread.

I'll compare what changes I had to make to the trans temp vs what you show here and see if there is a correlation with the oil pressure.

Try adding 01 to the end of TXD line. The '09 Alpha needed that for TFT, but my '10 Alpha did not. Perhaps the EOT/EOP need that 01 for an '08 or '09 Alpha.

 

[JPaul]

Try adding 01 to the end of TXD line. The '09 Alpha needed that for TFT, but my '10 Alpha did not. Perhaps the EOT/EOP need that 01 for an '08 or '09 Alpha.

I think you're right, my TFT has that. I'll give it a shot.

 

[JPaul]

It probably would have also helped to put the codes all in correctly, but I have oil pressure and temp working now!

I'll get pics of the settings up later.

Oil pressure is a bit lower on the ultragauge than it is on my MaxTow gauge, almost 10 PSI, but the sender for the MaxTow is right by the filter, while the OEM sensor is at the top of the block, so I think that sounds right.

At idle I see 22 psi from the ECU, and 30 psi from my MaxTow gauge.

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[JPaul]

 

[Alpha X]

That's great, I'm glad it worked for you.

 

[cgalpha08]

Bumping this so others find it. I got the transmission temp and oil pressure working on mine. I have an 09 alpha and I had to remove the last "01" on the TXD code, so maybe it's a late 09? Idk lol anyway it works and that's awesome!

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