Finally replaced all 4 O2 sensors w/ generics for $160. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

P0131: Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1 - 3) - Signal Wire Short Circuit to Ground or Incorrect
P0137: Oxygen Sensor After Catalytic Converter (Cylinders 1 - 3) - Signal Wire Short Circuit to Ground or Incorrect
P0151: Oxygen Sensor Ahead of Catalytic Converter (Cylinders 4 - 6) - Signal Wire Short Circuit to Ground or Incorrect
P0157: Oxygen Sensor After Catalytic Converter (Cylinders 4 - 6) - Signal Wire Short Circuit to Ground or Incorrect
P1115: Oxygen Sensor Heating 1 After Catalytic Converter - Above Upper Limit
P1119: Oxygen Sensor Heating 2 Ahead of Catalytic Converter - Below Lower Limit

larez2 · 07-27-2007, 09:27 AM

I have a 99' with the 2.5 and I just replaced all 4 o2 sensors with the cheap ones mentioned on this thread (USOS 4000) and I'm having problems similar to the other guys with the 2.5 engines

Before I was getting:
p0134 (no activity detected bank 1 o2 sensor)

The error codes I'm getting now are:
p0131
p0151
p0137
p0157
and
p1115
p1119
p1117
p1127

The errors all have to do with low voltage and heating on all 4 of the o2 sensors. I double checked the wiring and they match up as they should. The guage of the wiring on the cheap o2 sensors is a lot smaller than the OEM, so maybe that has something to do with why the don't work.

Larez2