Oxygen Sensor for Peugeot 508

[Bathey]

Hi All,
Has anyone had any experience with faulty O2 sensors? I recently replaced the High Pressure Fuel pump on the 1.6 THP Engine and now it seems to have a fault in the post-Cat sensor. I believe that they are not indestructible and I have just clicked over 160,000 kms. Any assistance appreciated.

 

[alittlewino]

Hi All,
..... I have just clicked over 160,000 kms. Any assistance appreciated.

on a 2.0l 306 it's stated the O2 sensor should be replaced every 10yrs or 100,000kms - I can tell you the improvement in fuel economy and general responsiveness was significant given ours was 16yrs old and 130,000kms

 

[seasink]

You can test an oxygen sensor by meauring the voltage maximum on the signal outputs. There is also a heating circuit.

The sensor is exposed to an extreme environment, sometimes incorrect fuel or oil or water, and doesn't last forever. They have a maximum life of about 150,000 km, and often much less.