Sensor Proficiency Unlocking the Secrets of Normal Readings

Normal O2 Sensor Voltage Readings. The normal voltage range for an O2 sensor fluctuates between 0.1 and 0.9 volts. This isn't a static reading ... ... normal fuel trim values in closed-loop. When we encounter a MAF sensor-equipped vehicle exhibiting these symptoms, we need to check for unmetered airflow first. Anyway, the downstream O2 should be somewhere in the middle (0.45V) if the cat is still there. The AF sensor though, as per the FSM, fluctuates ... It's the ECU responding to changes from the O2 sensor that you see taking place. I found out about 15 years ago that as they get old they become lazy and the ... Actual grams per second, voltage or frequency readings should come from the MAF signal data on the scan tool at specified rpm settings. Example 1. A good MAF ... Reading for a good sensor should fluctuate from 0.2 to 0.8 with 0.1 being (lean) and 0.9 being (rich); and average 0.45 volts (balanced). I picked up a bluetooth doohickey and Torque app, and I noticed that on my 1996 3.4 automatic, my O2 Bank 1 Sensor 1 is reading between .3V and ... With the engine at normal temp (80-100C) and airbox in place, VERY rough readings should be: Idle rpm = 20 kg/hr 1000rpm = 30kg Rich is normal if you took those readings at idle, but that's quite rich for a warm cruise. Was this on a really cold day with very low ... Was expecting the air flow readings to be the same for each bank. Should they be the same and, if so, what would a normal reading at idle be?