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I replaced my front O2 sensors yesterday because I kept getting a P0155 code. The ARH headers had the sensor bungs horizontal, rather than angled down at least 10 degrees from sensor manufacture recommendations. Seems like the moisture gets trapped inside the sensor over time leading to failure. The 10 degree angle allows moisture to drip out. Of course this isn't an issue with the original manifold because I believe they are almost pointing down.
Nevertheless, I had a shop make new holes, install new bungs, and cap off the old bungs, before installing the new sensors. The CEL is gone for now, but we'll see how it plays out. My first CEL was a couple days after the LT install, but it was a different code, for cat efficiency, which wasn't really a concern..since i have no cats. About a month into driving (1500-1600 km's), I then got the P0155 code.
Attached is a photo of the sensors that came off. The orange-ish sensor is from Bank 2 (driver's side) and is the sensor that failed. I am going to contact sensor mfg's to figure out what the colour means. Usually orange means additives, and the only additive I added was Sta-Bil over the winter when the car wasn't used. Other than that, I am using Petro Canada Ultra 94. Im just curious as to why only this side is orange, unless the orange was just the wide-band O2 (with heating circuit) going out with a bang because of the moisture. Im saving Bank 1's sensor as a spare in-case I have further issues (hopefully not).
I also got rid of my extensions after I un-clipped the harness from the top of the transmission and had enough slack to not only comfortably get to the original ARH sensor locations but also my new locations which are about an inch downstream of the ARH locations.
Thanks to anyone who gave me input over the last couple weeks while I was dealing with this issue.
Nevertheless, I had a shop make new holes, install new bungs, and cap off the old bungs, before installing the new sensors. The CEL is gone for now, but we'll see how it plays out. My first CEL was a couple days after the LT install, but it was a different code, for cat efficiency, which wasn't really a concern..since i have no cats. About a month into driving (1500-1600 km's), I then got the P0155 code.
Attached is a photo of the sensors that came off. The orange-ish sensor is from Bank 2 (driver's side) and is the sensor that failed. I am going to contact sensor mfg's to figure out what the colour means. Usually orange means additives, and the only additive I added was Sta-Bil over the winter when the car wasn't used. Other than that, I am using Petro Canada Ultra 94. Im just curious as to why only this side is orange, unless the orange was just the wide-band O2 (with heating circuit) going out with a bang because of the moisture. Im saving Bank 1's sensor as a spare in-case I have further issues (hopefully not).
I also got rid of my extensions after I un-clipped the harness from the top of the transmission and had enough slack to not only comfortably get to the original ARH sensor locations but also my new locations which are about an inch downstream of the ARH locations.
Thanks to anyone who gave me input over the last couple weeks while I was dealing with this issue.