What is a normal downstream O2 sensor reading?
Once the converter lights off, the downstream O2 sensor will settle down and “flat-line” at a steady voltage reading usually around 0.45 volts or so.
How does the downstream O2 sensor work in a car?
If this code only applies to the downstream O2 sensor then it will not affect the open/closed loop operation of the engine. The downstream O2 sensor controls the heat of the catalytic converter. It slightly richens the mixture to make the cat heat up faster, and it leans it a bit if the cat gets too hot.
What happens when O2 sensor reads 0.500v?
You guys have the o2 sensor backwards. When their is a lean condition, the voltage drops, when there is a rich condition, the voltage increases. An o2 sensor (not Wideband o2) cannot accurately measure HOW rich or HOW lean the exhaust is. 0.500v is considered stoichmetric (the proper amount of fuel).
Is the b1s2 oxygen sensor reading 0 volts?
The freeze frame data shows that the B1S2 oxygen sensor reads 0 volts. To verify the o2 sensor works, I switched the two downstream sensors. I still have the same problem. The problem didn’t move with the sensor. To verify the wiring, I plugged the B1S2 harness into the B2S2 o2 sensor and it worked plugged into the other side of the car.
What is the trouble code for the oxygen sensor?
o2 sensor reads 0 volts. trouble codes oxygen sensors che… Q: o2 sensor reads 0 volts. I have a 2000 Ford Mustang v6 3.8L with a P0122, but the code isn’t the main issue. The freeze frame data shows that the B1S2 oxygen sensor reads 0 volts. To verify the o2 sensor works, I switched the two downstream sensors. I still have the same problem.
What are the downstream sensors on an oxygen converter?
On a scan tool, the downstream O2 sensors will usually be identified as Sensor 2 or 3. The PCM compares the readings of the upstream and downstream O2 sensors to see how well the converter is reducing pollutants in the exhaust.
Can a downstream O2 sensor affect engine performance?
Seems as though the downstream sensor has minimal to no affect on engine performance. Definitely not running in limp mode.
What is the voltage of the O2 sensor?
Once the converter lights off, the downstream O2 sensor will settle down and “flat-line” at a steady voltage reading usually around 0.45 volts or so.
How does the PCM monitor the O2 converter?
The PCM compares the readings of the upstream and downstream O2 sensors to see how well the converter is reducing pollutants in the exhaust. When the engine is first started, the downstream O2 sensor’s output will mirror that of the upstream O2 sensor, and flip-flop back and forth between rich and lean.