Quote:
Originally Posted by WithHonor037
But I there is an issue causing the engine to run lean or run rich it will not flip back and forth regardless. It will simply display information from what it sees.
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this ^^ you are telling me that you are not in closed loop, but rather, the O2 sensor is reporting 0Volts constantly when the engine warms up. Is that right?
If you were in closed loop, and the O2 sensor was pegged at 0volts, then the ECU would keep adding fuel to it's maximum adjustment in an attempt to bring that sensor voltage to 1.01volts. You would be telling me this: "My O2 sensor is pegged at 0volts, but my car is running super rich and blowing black smoke" which would mean bad o2 sensor for sure.
But instead you are saying this: "my car warms up and the O2 voltage pegs at 0volts but the engine does not get rich in an attempt to fix the lean situation" which tells me that the ecu is not attempting a correction which tells me that you are not in closed loop (or the computer would be trying to fix the 0voltage problem). On the other hand, it may be attempting a correction in closed loop and you could be in closed loop, but the fuel requirements are not being met because of an issue with your: (fuel pump, regulator, fuel filter, blockage, fuel level, fuel sock, injectors, etc). We could verify this by driving the car. If it cannot maintain acceleration above a cruise (falling on it's face because of a lean situation during driving) then we stop looking at the O2 sensor and start diagnosing a fuel system issue.