tonyrubicon

Hi all, I’m new here.

I just picked up a 2014 S5, triple black edition. I love this thing, but I can’t seem to get rid of a sport differential system fault.



Both sensors have 5v, but it keeps throwing this error. I’m honestly stopped. Has anyone experienced this issue before?

SMac770

I'm not sure what that DTC text is trying to imply. Each sensor has four independent wires from it directly back to the J492.
1 - temp value
2 - ground
3 - 5V
4 - pressure value

The pressure value is just an analog voltage output between 0.6V and 4.4V. Brown puts out a linear pressure<>voltage relationship, black puts out an inverted relationship. This assists diagnosis.

The temp sensor is apparently just a NTC thermistor. But unlike the pressure value, there's no information on the output signal for the temp value.

The only intelligent interpretation of that DTC text is there is a short of the pin 1 wires between the two sensors. More likely, the J492 is seeing the same temp value from both sensors and assuming somehow they are shorted together because such result should not be possible? I find the text very unhelpful. You probably need to assess the measuring values to see what's actually going on, but you'd also need someone else with an 0BF to offer up a known good profile against which to compare.

tonyrubicon

Thank you @SMac770 . At least I'm glad to know I'm not the only one stumped.

conker

Did you ever sort this issue? I have the same fault coming up. Cheers!