View Full Version : Oxygen sensor issues

16-11-2007, 02:45 PM
I have a 1996 A6 Quattro with a 2.8L motor

I scanned for faults and received the DTC's listed below. I replaced the O2 sensor on the drivers side after the converter. I cleard the code but it came back right away. These are the only faults that show up.

It should be noted that I bought the sensor with the plug and the wiring under the car and the plug has no corrosion.

Does anyone have any thoughts as to what i should look at next?

I did find a technical service bulletin that indicated I should check fuse S73 but I am unable to figure out where this fuse is. In addition, according to the wiring diagram this fuse supplies power to both sensors and I'm only getting a fault form one.

This vehicle has two new converters

Address 01: Engine Labels: None
Part No: 8D0 906 266 A
Component: 2,8l V6/2V MPI OBD2 D03
Coding: 01242
Shop #: WSC 11111 4 Faults Found:
16525 - Oxygen (Lambda) Sensor B1 S2; Heating Circuit: Malfunction
P0141 - 95-00 - Unknown Error Elaboration
16522 - Oxygen (Lambda) Sensor B1 S2: Signal too High
P0138 - 95-00 - Unknown Error Elaboration
Readiness: N/A