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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > N54 Emissions Readiness



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      10-06-2016, 02:07 PM   #1
kaptainswanky
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N54 Emissions Readiness

Hey guys, I'm having trouble getting my O2 sensor monitor to check ready, and was wondering if there was any further troubleshooting I could do before going into the dealer for diagnosis.

Stats: 2012 335iS 6mt, 42k miles, BONE STOCK, IAN0S software

What I've tried/checked;
600 miles worth of mixed driving driving
6 FTP drive cycles (as close as you can get on surface streets in SoCal, never going over 3k rpm/60mph/ not overly modulating throttle)
Checked idle A/F ratio, target and actual; hovers around 14.7%
O2 voltage on both banks stays between .1-.9
No pending codes, stored codes, or displayed codes
No MIL/SES light

All the other monitors are set ready, including CATs, 02 heater, and EVAP, just O2 readiness sitting there waiting.

I'm using an OBDLink BT reader talking to the Torque Lite/OBDLink apps on an android device if that matters.

Thanks for any help!

Last edited by kaptainswanky; 10-06-2016 at 02:15 PM.. Reason: title change
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      10-06-2016, 04:57 PM   #2
kaptainswanky
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Screenies from both apps:

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      10-09-2016, 11:24 PM   #3
kaptainswanky
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No dice, huh? Guess I'll have to schedule an appointment with the man then!
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      10-10-2016, 01:32 AM   #4
kkasson
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Quote:
Originally Posted by kaptainswanky View Post
No dice, huh? Guess I'll have to schedule an appointment with the man then!
Is this what you've been trying to do?

If so, not really sure what else to say besides keep trying it..
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      10-10-2016, 12:29 PM   #5
kaptainswanky
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Yep, that's the one I've been trying.

Sidenote, I connected up MHD to check inside that app, still reads INCOMPLETE for Oxygen Sensors. On the otherhand, I noticed this under software:



Notice how the current software is different than the factory software, does anyone know if this just means the factory software was updated to a newer OEM build at some point, or is this indicative of an aftermarket flash?
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      10-19-2016, 12:20 PM   #6
kaptainswanky
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Update for any folks that have this issue in the future; dealer was unable to get the monitors to check either, they ended up reprogramming the DME and the monitors set after 2 drive cycles.

I'm not sure what exactly they reprogrammed, but now my doors don't autolock over 5mph anymore...
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      09-19-2022, 02:22 AM   #7
slow_IS
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Quote:
Originally Posted by kaptainswanky View Post
Update for any folks that have this issue in the future; dealer was unable to get the monitors to check either, they ended up reprogramming the DME and the monitors set after 2 drive cycles.

I'm not sure what exactly they reprogrammed, but now my doors don't autolock over 5mph anymore...
What did you do ? Might have to take it to the dealer because I can get the 02 monitor set for my life !!!! And it's killing me have been doing the drive cycle for about 2 weeks ! Everything else is fine tho
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      10-06-2022, 09:55 AM   #8
jadams161
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There are several posts about this issue ONLY on the 335is. Dealer has to flash new software to DME.
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      09-19-2024, 09:12 PM   #9
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It’s 2024 and I hope I don’t get roasted but I’ve been driving 2012is with the same incorrect software. I remember when I first installed mhd the ecm threw a software tampering code. Hate that I have to pay to reprogram at the dealer.
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