Lambda Sensor (G39): Short to Positive

Hello everyone.

I'm having a problem that's driving me crazy, so I'm asking the experts here.

Regarding the vehicle: The vehicle functioned perfectly despite the error, with no hesitation or jerking, either at idle or under extreme load. The check engine light was not illuminated. However, it would occasionally stall at traffic lights, but could be restarted immediately.
Error scan:
Vehicle type: 1J - VW Golf/Bora IV / Year of manufacture: 1999 / 1.6 / Engine: AKL
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76
Mileage: 163,730 km
"Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen."
Address 01: Engine, Label file: RKS\06A-906-019-AEH.lbl
Part number: 06A 906 019 BQ
Component: 1.6l 2V/R4 SIMOS HS3120
Encoding: 00031
Operating number: WSC 31414

"One error found:"
00525 - Lambda sensor (G39)
28-00 - Short circuit to positive.
Readiness: Not Available.
"Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen."

Okay, the error is now clear, and I replaced the oxygen sensor as usual. I checked all the cables, fuses, ground wires, etc. I cleared the error code. I took it for a test drive and then ran another diagnostic scan. The error code reappeared!

Does anyone have a reasonable explanation for this problem? Because I'm standing there in front of the customer, feeling like a complete novice...

Regards,

Reno.

Hello Reno,

Loose connection in the cable to the sensor? If the signal line is broken, this type of error can occur depending on the configuration of the input stage in the control unit.
Disconnecting the cable equals the input stage's potential determining the level.

Best regards, Rainer.

Hello Rainer,

Thank you very much for the prompt reply!

Regards,

Reno.