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  #1  
Old 04-01-2018, 02:55 PM
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Code 235 / P1092

Hi guys, i have a 2006 X5 3.0i 90k miles. I have this code that i am trying to get rid of and nothing i did so far helped me. I did some research on the internet and i have found only one success story on resolving this(by changing one of the o2 sensors), but that fix didn't help me.

One thing i have to mention, i am not sure if it has anything to do with this, but right before i started getting the code i changed some components to the cooling system(thermostat was stuck on open); i changed thermostat, water pump, expansion tank; on top of that i added one can of liqui moly jectron when i filled the tank.

What i did so far trying to fix this:

changed upstream O2 sensors
changed intake boot
changed disa
changed spark plugs and coils
changed valve cover gasket.
cleaned maf

Car runs great...smooth, no power loss, very good MPG 20-21.

Anyone else had this issue? if so, how did you fix it?

Last edited by mihai; 04-01-2018 at 10:07 PM.
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  #2  
Old 04-01-2018, 05:01 PM
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Code 235 / P1092

Here's the list of suggestions :

Low fuel pressure
Large vacuum leak on engine
Faulty Mass Air Flow (MAF) sensor
Faulty Ignition
Faulty fuel injector

Looks like you addresed most except the injectors and fuel pressure.

Test fuel pressure to make sure to have enough (50psi or so) check under load (a good punch of throttle should work without driving ) it should not dip more than a couple psi.

If psi stays high it's got to be the injectors you addressed everything else I think.


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Last edited by andrewwynn; 04-24-2019 at 09:29 AM.
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  #3  
Old 08-10-2018, 12:21 AM
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SOLVED

I cleared the adaptations with inpa. That's all i had to do...wasted months of troubleshooting and never crossed my mind that after clearing the code, i should try to clear the adaptations.
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Old 08-24-2018, 12:59 PM
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Did the code come back after clearing adaptions, I have a P1093 code which came back after clearing adaptions. Came back after about 600 km.
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Old 04-23-2019, 07:53 AM
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Same with me. Did everything as the op. I am chasing P1092 for almost a year. After clearing/resetting the fuel adaptation, it stayed off for about 1,000+ miles then it came back (. it went away a few short times by itself but mostly stay on (80%).

Help - help - help please?
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Old 04-23-2019, 09:29 AM
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You guys done a smoke test? There are a few vacuum hoses that can deteriorate and cause vacuum leaks.
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Old 04-23-2019, 12:12 PM
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Yes, there’s no vacuum leak. I am guessing that there is something borderline broken, hence the light was off for a long time. At the present, it even flipped off then on by itself but stayed on more offen. After resetting the fuel adaptation, I was happy and thought that I got it fixed but it was short lived
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Old 04-23-2019, 01:04 PM
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When was the last time the CCV and associated hoses were done?
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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  #9  
Old 04-23-2019, 04:30 PM
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same thing happened to me. went away for a while...came back; after that it went away on it's own and was replaced by p1093. i have a feeling that it might be the downstream O2 sensors; i didn't change those; only the upstream ones; i might replace them this summer; i have a small oil leak on the left side. i think it's the ofhg; i will do my CCV then also
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Old 04-24-2019, 04:11 AM
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@Crystalworks: you are good. Here is my complete story: about a year and a half + ago, my problem with p1092 started. I looked up in this forum for help and did the following repair:
a) cleaned with Techron - not resolved
b) replaced MAP - not resolved
c) clean/check DISA - not resolved
d) clean/check idle control valve - not resolved
e) new spark plugs - not resolved
f) replaced 2 front O2 - light went away for a while then came back
g) replaced 2 rear O2 - not resolved
h) found/replaced a broken rubber vacuum cap in the back of the engine - not resolved
i) smoke test and found vacuum leak. The bottom hose of the CCV was broken. Whole CCV valve and all hoses replaced. This also resolved a serious oil leak that I didn’t know the cause. SES P1092 went off for about 5k+ miles. I was happy but then it came back on and off (mostly on). No vacuum leak from here on
j) re-investigated the issue, found mihai’s suggestion so I paid for a fuel adaptation reset. The light went off for a long while then it came back AGAIN, on and off but mostly on.
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