Fuel Level: How to Check Your Car's Gauge

Hello there!

I'm trying to read the data from my car (GOLF 2.0 TDI 2004). I can read everything (mileage, central locking, power windows, etc.) except for the fuel level. Does anyone know which CAN ID message that would be? Is it even possible? I would appreciate any information regarding the specifications.

Sincerely, Ado.

Den Füllstand des Kraftstoffs kann man sicher auslesen.
I don't know which department is responsible for that.

Best regards,
Maxx.soot
MBest regards,

Hi Maxx,

I've found out that for the fuel level reading, ID 621, byte number 4 is used. I can connect to the infotainment system, but I still can't connect to the OBD2 (CAN - High, CAN - Low wires), even though I have no problem connecting to the infotainment. Do you know the reason why this might be happening, and perhaps how I could resolve it?

Best regards,
Ado.

Hello Maxx,

I've found out that for the fuel level reading, ID 621, byte number 4 is used. I can connect to the infotainment system, but I still can't connect to the OBD2 (CAN - High, CAN - Low wires), even though I have no problem connecting to the infotainment. Do you know the reason why this might be happening, and perhaps how I could resolve it?

Best regards,
Ado.

Liegt vermutlich daran, dass kein CAN im OBD anliegen ist.
Probiers mit dem AGV4000, der unterstützt alle gängigen Protokolle.

I tried to connect to the CAN bus in the OBD2 port of a 2007 Audi A3, but I was unsuccessful.
It worked with the AGV4000, but not with CAN.fgIt worked with the AGV4000, but not with CAN.The AGV4000 worked, but the CAN system did not.Best regards,

Liegt vermutlich daran, dass kein CAN im OBD anliegen ist.
Probiers mit dem AGV4000, der unterstützt alle gängigen Protokolle.

I once tried to connect to the CAN bus in the OBD2 port of an Audi A3 2007, but without success.
It worked with the AGV4000, but not with CAN.



What I really need is to connect to CAN - High and CAN - Low in order to access the data. I don't need a USB or COM connection. CAN - High and CAN - Low are available, but I only get 'Empty Datas' when I connect to them. The reason for this is what's driving me crazy. I would be grateful for any suggestion or hint as to why OBD isn't sending data via CAN - High and CAN - Low.

Sincerely,
Ado.The AGV4000 worked, but not with CAN.

Best regards}

What I really need is to connect to CAN - High and CAN - Low in order to access the data. I don't need a USB or COM connection. CAN - High and CAN - Low are available, but I only get 'Empty Datas' when I connect to them. The reason for this is what's driving me crazy. I would be grateful for any suggestion or hint as to why OBD isn't sending data via CAN - High and CAN - Low.

Regards,
AdThe AGV4000 worked, but the CAN system did not.best regards}What I really need is to connect to the CAN - High and CAN - Low lines in order to access the data. I don't need a USB or COM connection. The CAN - High and CAN - Low lines are available, but I only get 'Empty Data' when I connect to them. What's causing this is what's driving me crazy. I would be grateful for any suggestions or hints as to why the OBD device isn't sending data via CAN - High and CAN - Low.Best regards,

OBD only sends data that you request. Therefore, you must first send data in order to receive any data back.
I don't know what those messages look like.

Best regards,

Okay. Otherwise, you would have to directly access the respective bus (Motorcan, Info CAN, etc.) .
The OBD data is filtered through the diagnostic interface .