So, I have an APSX Wideband O2 Air/Fuel gauge connected to my exhaust immediately aft of the header collector. Two bung's welded vertical and at a 45 degree. This is the fourth O2 sensor that has failed in as many months. Anybody using the APSX brand gauge? The first two that went bad- I attributed to china, but now I am not so sure. Two failed on the vertical bung and now two on the 45 degree bung. Bosch, Denso and Chi-com sensors have all failed. Reached out to APSX but nothing.. I'm ready to install a different brand and see if that does the trick. I know they fail from time to time, but this is nuts. Many Thanks!! Beep Beep
excessive oil consumption, silicone from internal coolant leaks, using silicone sealant in the engine and some over-the-counter fuel additives can cause your O2 sensors to fail.
And condensation can cause them to fail, hence the positioning if the bung. Lotsa things make them go PooF as stated above!
Thermal shock and leaded fuel will also do it. Using a heat sink style bung extender will help considerably.
