02 Sensor Voltage At Idle
02 Sensor Voltage At Idle. If raising the idle causes the sensor's voltage to drop, then replace the sensor due to sluggishness. The o2 sensor voltage readings did not change, so our diagnostic tech requested voltage readings on the command (ground) side of the b2s2 wiring.
Steps ~ rough idle and 02 sensor voltage drops to zero, cylinder 2 misfire O2 sensor voltage at idle? Oxygen sensor voltage readings and possible misfire at idle.
I Say Mostly Because When I Bought The Car It Already Had Been.
That being said, according to the nissan shop manual the correct voltage for the air/fuel ratio sensor should be 1.5volts at optimum. And seems like you should observe a larger o2 move. Just had a another thought on the rough idle and stalling:
You Can Drive It Just Fine With The Broken Sensor;
If, after starting the engine and warming to operating temperature, the 2,2 oxygen sensor is observed to be stuck high, or close to 1 volt and the voltage doesn't drop or vary, then turn the engine off. Sometimes its not the sensor at all that failed. I feel that the car is laggy, and when i plug into the ecu with a diagnostics computer, i'm seeing that the upstream o2 sensor (#1) is reading about 3.8v at idle, while the downstream o2 sensor (#2) is reading between 0.5v and 0.8v.
But, If You Were At Positive Wot Ltfts Already, The Pe.
The timing of the rough idle exactly coincided with voltage on 02 bank 2 sensor 2 dropping to 0. Obdii scanners/ software do not read the voltage correctly for air/fuel ratio sensors. And no more bouncing around while trying to set timing, etc.
What I See Is That The Commanded Egr Went To 0% For About A Minute, Then Three Things Happened Simultaneously As The Check Engine Light Turned On:
Once the car starts being driven, the voltage jumps and stays steady around.655 to.720 and will sometimes steadily decrease by.005v about every 2 seconds. (the converted) ive been doing some research on this and i think i got the answer for the red top at least. Mostly all tuned by myself.
My Problem Seemed To Be A Combination Of Dying O2 Sensor, Leading To A Bad Tune, And A Ghetto Wire Installation I Found At The Throttle That Would Occasionally (And Slightly) Prevent The Pedal From Coming All.
This sensor works very differently than a o2 sensor, it outputs a steady voltage, it does not swing rapidly like a o2 sensor. Getting o2 and or esc codes? The ecu basically ignores it until you get into the catalyst monitor test range mph.
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