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You are watching: 1998 chevy silverado oxygen sensor location


Please help me with my 1998 Chevy Tahoe 5.7L 4x4. This spring my check engine light came on, I brought it to Autozone and they scanned it with their OBD2 car reader and it revealed code P0161, O2 sensor heater circuit malfunction (bank 2 sensor 2). I purchased the O2 sensor, but then read online that they can be very difficult to remove if they have been in for a long time. I decided to bring it to a garage and have them do it for me. A few days later the light came back on. Same code P0161.I brought it back to the garage and explained that the light had come back on and was revealing the same code. They inspected and discovered that they had installed the sensor I brought to them at location Bank 1 sensor 2, not Bank 2 sensor 2. I paid them for a new sensor and labor to install one at location Bank 2 sensor 2. Problem seemed to be solved and light did not return.Fast forward 3 months. After having some transmission work done last week the check engine light returned. Same code, P0161. I figured maybe they had tugged on some wires on something while working on the transmission, so I brought it back to the garage that did the O2 sensors for me and explained I thought maybe a wire had become disconnected while the transmission shop was working around it. They tested the connections to both Bank 1 sensor 2 and Bank 2 sensor 2. Everything seemed to test out fine, so they ended up swapping the two sensors. We were trying to determine if the check engine light would follow the sensor. This way if the light came back on and said P0161 we would know that it must be in the connection from the car"s computer to the wire harness for the Bank 2 sensor 2 sensor. And if the light returned and revealed the code for Bank 1 sensor 2 we would know it was the sensor itself. Well today the light returned and revealed code P0141 O2 sensor heater circuit malfunction (Bank 1 sensor 2). The code seems to have followed the O2 senor"s change of location. I want to replace this sensor, right? I"m tired of bringing my car into the garage, and have spent nearly $600 trying to get this dang check engine light off. I am confident I can swap the sensor myself this time. Autozone will replace the original sensor I purchased from them in April, and has an O2 sensor wrench I can borrow. I"m not so worried about the sensor being seized in there because it has been out now twice in the last 3 months.My question, where is the location of Bank 1 sensor 2? I believe it is behind the Cat, but have heard conflicting info as to weather it is on the drivers side or passengers side. Anybody know for certain.Sorry this was so long.

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