118i 1 Series e88 P2096 issue - opinion needed

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Manufactured from 2004 to 2013

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mate.118i
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118i 1 Series e88 P2096 issue - opinion needed

Post by mate.118i » Sat Oct 20, 2018 12:44 pm

Hi bimmers,
I have a check engine light going and coming (mostly coming :) ). Tried 98-octane fuel, even 100-octane fuel.
Resetting the error makes the check engine light go off, then a few days later comes back
the error reading is P2096 Post Catalytic Converter Fuel Trim 1 – Too Lean.
I got these reading while on 2000rpm - https://youtu.be/lRdxtJwImh0
What is not visible on the video but noticed while driving around the city, is that the LAMBDA11 sensor detail on the OBD tool sometimes spiked to 1.8 and 2.0, sometimes stuck on 2.0 (i don't even know if this matters)
My car is an N43 engine, 1-series e88, 2008 cabrio.
What is your opinion?
Mate I.

Dano1bfc
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Re: 118i 1 Series e88 P2096 issue - opinion needed

Post by Dano1bfc » Sat Oct 20, 2018 9:22 pm

Hey buddy . If it’s lean I suspect injectors or pump ? Du get misfire codes? Specially being 4 cylinder facelift unfortunately .

Dano1bfc
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Re: 118i 1 Series e88 P2096 issue - opinion needed

Post by Dano1bfc » Sat Oct 20, 2018 9:23 pm

Does it hesitate between 1200 and 2000 rpm? I hope I’m wrong btw as it’s pricey pal .

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Nottsknots
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Re: 118i 1 Series e88 P2096 issue - opinion needed

Post by Nottsknots » Sun Oct 21, 2018 7:32 am

A lambda of 2 is OK for the N43; its a lean burn engine that chucks in more air than the fuel can burn.

“Sticking” on 2, now that might be a clue. That engine can run up to about 4, so its possible there is a faulty sensor, or faulty something upstream that causes it to stop by around 2 (but if its exactly 2 through a range of load and revs, then thats unlikely).

Personally, I’d probably start by examining/changing that sensor: cheaper than anything else. Then work from there, knowing you at least have good data.
E87 118d, stock, plus PDC control unit drain, Parrot, debadged, Mothercare baby shades (but no babies), and occassionally a good layer of wax. Instantly forgettable, and thats the way I like it.

mate.118i
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Re: 118i 1 Series e88 P2096 issue - opinion needed

Post by mate.118i » Wed Oct 31, 2018 3:49 am

Thank you guys for the replies
I have ordered a Lambda sensor for start, fingers crossed that this is the issue
Read on internet that a lambda sensor should be changed as part of maintenance when 100.000km are reached, bot sure if this is valid, but it it is valid, they i supposed to change it anyway.
I'll update you once changed

mate.118i
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Re: 118i 1 Series e88 P2096 issue - opinion needed

Post by mate.118i » Sun Jan 20, 2019 2:15 pm

Hi guys,
I know its been sometime. so it took a few weeks for the oxygen sensor to arrive.
Had it replaced mid-November and guess what - a week later - engine light back again.
So i ordered a FoxWell NT510 diagnostic reader, arrived a few days before Christmas.
Now that the holiday season is over finally got myself to look into fault codes. I got these errors:

CAS:
D904/not present - CAS K-CAN line fault
DME:
2EF7/not present - DME Map thermostat activation
30C1/not present - DME Engine-oil pressure control, static
2AF4/not present - DME Nitrogen-oxide sensor, electric
2AF2/not present - DME Nitrogen-oxide sensor, lambda linear
2AF6/not present - DME Nitrogen-oxide sensor, signal
3C31/not present - Oxygen sensor emissions control
2AF9/not present - Nitrogen-oxide sensor, NOx signal coast-mode check
2C6B/not present - DME- Oxygen sensor after catalytic converter, system check

I'm thinking of going for a smoke test, unless I'm missing an obvious fault with the above (not even sure if just 1 could trigger all of them)
Opinions?
Mate I.

mate.118i
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Re: 118i 1 Series e88 P2096 issue - opinion needed

Post by mate.118i » Tue Jan 22, 2019 4:39 pm

Hi guys quick update (booked smoke test waiting for appointmanet date) i have reset all the errors and after less than a day driving received the below errors

CAS:
D904/not present - CAS K-CAN line fault
DME:
2EF7/not present - DME Map thermostat activation
30C1/not present - DME Engine-oil pressure control, static
2AF4/not present - DME Nitrogen-oxide sensor, electric
2AF2/not present - DME Nitrogen-oxide sensor, lambda linear
2AF6/not present - DME Nitrogen-oxide sensor, signal
2C31/not present - Oxygen sensor emissions control

So its 2x codes less for now, but maybe they’ll appear anyway after sometime probably.
Would you say that there’s an issue with the Nox sensor? And what’s the K-CAN line fault? Could it it be a wire that causes the whole issue?

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