Discussion Starter · #1 ·
Like the title says, but the thing is that I removed the downstream O2 sensor on the right bank, looked inside the honeycomb, and it looks pretty good. I can imagine the left is pretty much the same. On the other hand, the sensor tip looked a bit like if it has light rust on it. Can it be merely a bad O2 sensor that triggers my CEL? The coloration of the sensor doesnt seem to me like if the engine is passing oil, fuel or coolant to the exhaust. Also, my exhaust has the rotten egg smell.