Polo 86c, year of manufacture 1992

Hi.
I have the car mentioned above, and I'd like to know what kind of information can be read out from it.
With a dual connector and a K409 sensor connected via a serial cable, I can display the lambda sensor reading as the only data point.
Is there anything else I can do, or have I already extracted the maximum potential?

Best regards, Frank.

Hi!

Well, I'm quite sure there's more potential.

You should try Googling it if no one knows the answer.

The part number for the engine control unit would be helpful.

Hi.
Sorry for the late reply, but I was first sick, and then the computer stopped working.

The only number that appears is: 030 906 026 B.
Best regards, Frank.

This engine control unit only provides measurement block 0, which includes values for the oxygen sensor, altitude correction, and throttle valve.

Sure, no problem.

So far, I can only clear the occasional error code related to the oxygen sensor.
Otherwise, nothing is displayed.
Best regards, Frank.