Mastering Normal Sensor Readings A Key to Success

If the upstream O2 sensor voltages appear normal (cycling) and the downstream voltage is tracking the upstream O2 voltage then your cat is bad. 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 ... ... sensor is properly detecting the PCM's normal, frequent fuel mixture alterations. For now, forget about the downstream O2 sensor ("B1S2"). So, what exactly is considered a "normal" MAF sensor reading at idle? Typically, a mass air flow sensor reading at idle should be in the range ... Reading OBD2 Live Data. OBDNERDZ•94K views · 11:49. Go to channel · Short ... HOW TO KNOW IF OXYGEN SENSOR IS BAD TEST OXYGEN SENSOR. Auto ... If you remove it and look at the element, it's a platinum RTD, mounted on arms, which feed the circuitry. I have read somewhere that the MAF ... 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 ... All the O2 voltages over 1 volt are off-scale high (rich). While in closed loop mode, both sensor 1 voltages should be oscillating from around . Normal Fuel trim Oxygen O2 sensor values NA Engine (non-turbo) / Drivetrain / Exhaust Modifications. My understanding is that when the car is running and up the normal operating temperature, the sensor generates a voltage and ideally this should be around 0.45 ...