Demystifying Normal Sensor Readings A Comprehensive Guide

My MAP pressure is around 11 in/hg at idle. Not sure if that's right or not, but my car is running super lean. 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 ... I'm searching for the cause of a PO171 code, and find my downstream 02 sensor (just replaced) is reading in the .075-.1v range with the ... Ever since I've owned the car its also felt sluggish compared to my 2010 318D. Does anyone know if this MAF reading is normal? Thanks! Sam. When I was graphing the front O2 sensor the voltage readings were steady around 18000. ... Was car already at/past normal operating temp (ramp-up)?. I expect to see readings varying from ~0.1V, to 0.9V, but they often don't get even close to that, even when the sensor voltage actually is ... Mine has an average reading of 16 and has hit a high of 53 .... Per the tech manual it's 2.5 to 5.0 g/sec at idle and 7.1 to 12.5 g/sec at 2500 rpm. So my MAF sensor is working about right. My O2 sensors also both seem to ... 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). 110-145 is generally considered a normal range. For both of the fuel trim multipliers: A count below 128 is a lean command which means the ...