scanguage Catalyst temp °C

good question I would like to monitor that temp too, so far I am a beginner

 

Can you share some other samples of numbers you see on your ScanGauge for this? That would help us understand.

 

According to Adrian Black's spreadsheet, where this most likely originates, the color denotes that Generic means "Standard OBDII, should work on all cars". The -40 – 6513°C denotes the temperature range of the sensor. So, the -200 that you indicate is outside of the lower range of the sensor so does not sound right.

 

It is listed as a XGauge for the Gen 3. I checked your parameters against the spreadsheet and they matched the spreadsheet. From Adrian's comments and notes it appears that this XGauge has been tested and verified. I will have to try it on mine and see what I get.

 

I will try this on my ScanGauge too and see what I get

 

I tried this Ct1 XGauge today. The ICE was warm since I had just got home from church. It was displaying 585C.

I have no idea if this is correct or not but is within sensor range. I will monitor it again tomorrow morning during work commute and see what it does during 26 mile drive.

 

Just for info, I have tried both the Sensor 1 Bank 1 (Air Fuel Ratio sensor) temperature Ct1 and the Sensor 2 Bank 1 (Heated Oxygen sensor) temperature Ct2. They both indicated a temperature in the 650-700C range while driving steady state.

 

Have you noticed the temperature is 36C too high? If you parked your car overnight, the temperature should be close to ambient before warm-up.

Here is the list of standard PIDs as defined by SAE J1979. The given formula is ((A*256)+B)/10 - 40. Adrian uses a multiplication factor of 10 so the formula should be:

(((A*256)+B)/10 - 40) * 10 = ((A*256)+B) - 400 = 00010001FE70

For me, I did not use 10X since the decimal point is useless for values more than 99.9.

	Column 1
0	[TH]XGAUGE[/TH][TH]TXD[/TH][TH]RXF[/TH][TH]RXD[/TH][TH]MTH[/TH][TH]NAM[/TH][TH]Notes[/TH]
1	[TR][TD]Catalyst Temp B1 S1[/TD][TD]07E0013C[/TD][TD]02E80441053C[/TD][TD]2810[/TD][TD]0001000AFFD8[/TD][TD1]Ct1[/TD1][TD]C[/TD][/TR][TR][TD]Catalyst Temp B1 S1[/TD][TD]07E0013C[/TD][TD]02E80441053C[/TD][TD]2810[/TD][TD]00090032FFD8[/TD][TD1]Ct1[/TD1][TD]F[/TD][/TR]

Vincent

 

Hi Vincent,

I just tried them for the first time today going to and from work. I really did not know what to expect. I will use your parameters tomorrow and pay more attention to ambient temp at startup.

I also looked for these temps in your ZVW30 Custom PIDs for Android file and did not see them.

I am going to add these to my Engine Link file.

Thanks,

Dwight

 

Minor detail but I noticed with the miniVCI, the catalytic converter temperatures show as the 'last running' value. Once the engine starts, they drop down to ambient. A small effect with about a 10 second duration, still it surprised me.

Bob Wilson

 

Bob,

I noticed that too last night and again this morning. I was hoping to get a true ambient reading but as you say the value displayed at Ready is the last value at shutdown. Once the ICE starts and the value updates it is already climbing with ICE running. It is hard to get true ambient temp but close.

Dwight

 

Vincent,

I tried your parameters and they were in the 36C range lower than Adrian's. The starting temp was close to ambient but as Bob said it does not update until the ICE fires off so hard to tell.

Thanks for your SAE J1979 formula above. I was able to use this formula in the Engine Link PID and this worked fine.

Dwight

 

Torque already has it in the std list, however, I did post a mode 21 in the PiP section.

I 've observed the same in my c. Now I understand why the PiP is showing 761 deg F in EV mode (without ICE firing up).

Vincent

 

Catalyst Temp B1 S1, CAT B1S1, 2105, (E * 256 + F) * 9 / 50 - 40, -40 11756.3, F 7E0​

Catalyst Temp B1 S2, CAT B1S2, 2105, (G * 256 + H) * 9 / 50 - 40, -40 11756.3, F 7E0

Vincent,​

​

I tried your PID's from the PiP section that you linked above. The B1S1 responded but the B1S2 only indicated -40. I was sitting in the driveway so did not run the engine long once I saw the B1S2 not responding. See below for the obddata.log file response:

>2105
7E8 10 08 61 05 4E BB 08 F5
7E8 21 04 CB 00 00 00 00 00

There are A, B, C, D, E and F values but the G and H values are zero.

Dwight

 

>2105
7E8 10 08 61 05 4E BB 08 F5
7E8 21 04 CB 00 00 00 00 00

The response shows 8 bytes, which means G and H are not included. PiP has 10 bytes so it is different from Gen3. You can try to compare against the mode 1 response:

Catalyst Temp B1 S1, CAT B1S1, 2105, (C * 256 + D) * 9 / 50 - 40, -40 11756.3, F 7E0​

Catalyst Temp B1 S2, CAT B1S2, 2105, (E * 256 + F) * 9 / 50 - 40, -40 11756.3, F 7E0​

​

Vincent​

 

That's what I get with my Ultragauge.

 

Vincent,

The above settings exactly match the Mode and PID 013C and 013E values from the standard list. So you can add these to your ZVW30 spreadsheet if you would like.

I looked at the Engine Link Standard List and the 013C and 013E values are listed.

Thanks again,

Dwight