TDI AFN Burn Pressure: Explained & Troubleshooting

Translated on 02-09-2026, 16:48.

Hello,
I'm having the following problem:
To select the correct sensor for a cylinder pressure measurement, I need some information about the pressure ranges I can expect.
"Does anyone have information about the 1.9L TDI engine, specifically the AFN type, or perhaps a complete wiring diagram?"
It would be great if you could help me.

Best regards,

Matthias.

Guest Free account, no CAN development support

I am unable to access external websites or specific files online, including the URL you provided. Therefore, I cannot translate the text from the German link.

CU Gremlin.

Translated on 02-09-2026, 16:50.

Hello Gremlin,
You're right, I probably didn't look closely enough.

To put it more precisely:
I have a pressure sensor with a maximum pressure rating of 150 bar.
I am also aware that the previous engine, with its 66 kW output, had a maximum combustion pressure of 140 bar.

What is the pressure for the AFN type?

It's a matter of cost. These things aren't exactly cheap.

Best regards,

Matthias.

Guest Free account, no CAN development support

Okay, I'm thinking about the worst-case scenario and would opt for one with a 200 bar rating.
There are always some stupid coincidences...

See you, Grem,lin.