Defective STG 028 906 021 AT - Replacement

Hello.

Now that I've finally figured out that the ambient pressure sensor in my engine control unit (part number 028 906 021 AT) is defective, I need to replace it. Does anyone know anything about the characteristics of this sensor? I would appreciate any information.

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Okay, so to wrap things up: I received a used engine control unit, part number 028 906 021 F. It was originally installed in an Audi. However, I couldn't install the entire control unit in my Passat because the brake light switch data is read in a complementary way. So, I desoldered the ambient pressure sensor from the Audi control unit and installed it in my own control unit.

And now, it's all starting again, let's see how long it lasts....''


Considering that the new part would have cost 900 euros, I'm quite happy with what I paid: 35 euros for the used part and 30 euros for the wastegate valve (replaced as a precaution). The dealership would have definitely wanted 1500-2000 euros.

For electronics technicians:
The defect in the sensor could also be detected using a voltmeter connected directly to the sensor.

Thank you all again.