Oxygen sensor readiness

stevem0 · 08-07-2021, 05:24 PM

2011 535 xDrive

I have 3 not readies. 2 are Oxygen Sensor related. (The other is fuel ventilation system, I am going to replace the canister and look for leaks)

Any suggestions on the O2 sensors. I will attach screenshots of the ISTA, but I have ran thru all the drive cycles and keep checking and these guys are never ready, and all the O2 sensors seem to work fine.

I have these two not ready or not concluded:
Oxygen Sensor Monitoring
Oxygen Sensor Heater Monitoring

Below is the O2 sensor voltages, everything says on and active, not sure what it takes to get the O2 sensors ready????

https://ibb.co/Kq8n4HG

https://ibb.co/Fm7PvdC

Qsilver7 · 08-07-2021, 05:52 PM

Quote:

Originally Posted by stevem0

2011 535 xDrive … I have ran thru all the drive cycles and keep checking and these guys are never ready, and all the O2 sensors seem to work fine.

Which or what drive cycle? The drive cycle based on FTP (federal test protocols) mandates…or some other (unnamed) drive cycle? Just asking for clarification due to many different interpretations of what a “drive cycle” can be.

Are you saying that you did the 2nd test (for 4 min @ the given MPH) & 3rd test (for 15 min @ the given MPH) on the top side of the chart…plus you didn’t go over 60 MPH or 3000 RPM anytime during this drive cycle?

stevem0 · 08-07-2021, 09:59 PM

I have done several of them, here is the latest one I tried:
https://www.instructables.com/How-to...or-Smog-Check/

I have been getting intermittent (like 1/week) intake pressure fault codes. I reset, drive drive drive and no intake pressure codes. Then a few days later the engine light and the intake pressure codes are back. Today I inspected each one of the pressure sensors and made sure the wiring connections are clean and not loose. I thought those pressure sensors might interfere with the O2 readiness check. I will perform another drive cycle tomorrow from a cold start and let you know.

I am familiar with ISTA and exhausted all tests I could find in that system. Are there any tests in INPA that gives more insight into the O2 Sensors than ISTA?

stevem0 · 08-08-2021, 01:17 PM

The O2 sensors are ready now, yea!!! I swear I have been working on this (on and off) for over a year, I have had out of state plates because I could not pass emissions test. There must be something to the intake pressure sensors and the O2 sensor readiness.

At startup today there was a code from yesterday but was not active today:
code 101F01 Air mass system, plausibility: calc air mass in air intake not plausible

Qsilver7 · 08-08-2021, 01:52 PM

08-07-2021, 05:24 PM	#1
stevem0 Private 29 Rep 56 Posts Drives: 11 E90, F10, e70d Join Date: Jul 2016 Location: USA iTrader: (0)	Oxygen sensor readiness - Emissions Test 2011 535 xDrive I have 3 not readies. 2 are Oxygen Sensor related. (The other is fuel ventilation system, I am going to replace the canister and look for leaks) Any suggestions on the O2 sensors. I will attach screenshots of the ISTA, but I have ran thru all the drive cycles and keep checking and these guys are never ready, and all the O2 sensors seem to work fine. I have these two not ready or not concluded: Oxygen Sensor Monitoring Oxygen Sensor Heater Monitoring Below is the O2 sensor voltages, everything says on and active, not sure what it takes to get the O2 sensors ready???? https://ibb.co/Kq8n4HG https://ibb.co/Fm7PvdC
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08-07-2021, 09:59 PM	#3
stevem0 Private 29 Rep 56 Posts Drives: 11 E90, F10, e70d Join Date: Jul 2016 Location: USA iTrader: (0)	I have done several of them, here is the latest one I tried: https://www.instructables.com/How-to...or-Smog-Check/ I have been getting intermittent (like 1/week) intake pressure fault codes. I reset, drive drive drive and no intake pressure codes. Then a few days later the engine light and the intake pressure codes are back. Today I inspected each one of the pressure sensors and made sure the wiring connections are clean and not loose. I thought those pressure sensors might interfere with the O2 readiness check. I will perform another drive cycle tomorrow from a cold start and let you know. I am familiar with ISTA and exhausted all tests I could find in that system. Are there any tests in INPA that gives more insight into the O2 Sensors than ISTA?
	Appreciate 0 Quote

08-08-2021, 01:17 PM	#4
stevem0 Private 29 Rep 56 Posts Drives: 11 E90, F10, e70d Join Date: Jul 2016 Location: USA iTrader: (0)	The O2 sensors are ready now, yea!!! I swear I have been working on this (on and off) for over a year, I have had out of state plates because I could not pass emissions test. There must be something to the intake pressure sensors and the O2 sensor readiness. At startup today there was a code from yesterday but was not active today: code 101F01 Air mass system, plausibility: calc air mass in air intake not plausible
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08-08-2021, 01:52 PM	#5
Qsilver7 Major General 6511 Rep 9,838 Posts Drives: F06 650ix GC / F15 X5 50i Join Date: Oct 2016 Location: Indiana, USA iTrader: (0)	__________________ 2015 F06 650ix Gran Coupe`(Moonstone/Cohiba Brown)\| 2014 F15 X5 50i MSport (Space Gray/Mocha) Become a BMW CCA member! Click HERE to join and feel free to use my BMW CCA member #191509 as a referral.
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