Put a new DoS CAI on today and the second time I fired it up it threw a CEL. Used my ScanGauge to read and clear the CEL. On restart it came right back. The code is P115C and I suspect it might have something to do with idle speed. Each time I cleared it, the idle speed would change very slightly. Other than that the car is running great. Anybody know what that code means? Thanks in advance.

PS: Here's a pic of what the finished install looks like.

 

From a Document I found on one of the board, here is a list of a few codes. I hope it points you in the right direction
[FONT=&quot]P0110 Intake Air Temperature Sensor 1 Circuit
P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance
P0112 Intake Air Temperature Sensor 1 Circuit Low
P0113 Intake Air Temperature Sensor 1 Circuit High
P0114 Intake Air Temperature Sensor 1 Circuit Intermittent
P0115 Engine Coolant Temperature Circuit
P0116 Engine Coolant Temperature Circuit Range/Performance
P0117 Engine Coolant Temperature Circuit Low
P0118 Engine Coolant Temperature Circuit High
P0119 Engine Coolant Temperature Circuit Intermittent[/FONT]

 

Thanks NETMA1000. I did some deep digging last night and found out that P115C code is not a normal OBD II error code. Those are always listed as a letter followed by 4 numbers like in the list of codes you posted. Apparently no one knows what it is, not even BMW! WHY ME??

 

Clean your MAF... possibility that the new intake was coated with too much oil and it covered your MAF sensors. Get a can of MAF cleaner from autozone or autoparts store for like 5$, and drench the inside of the MAF, using the straw to get nooks and crannies. Let it dry for a good 15-30 minutes (even tho it looks dry) and try putting it back on.

 

Thanks loads BostonR56S ! I was starting to suspect that, but couldn't get myself to believe that K&N would over oil their own filters. Live and learn.

 

Dwight,

As I recall, you were running another aftermarket intake system before the DoS CAI that also uses a rather large oiled filter. There may have been some oil buildup on the MAF before you installed the DoS CAI and the initial tiny bit of vapor that comes-off our CAI during its first use may have been enough to put your MAF over the threshold of how much it can handle.

I would not clean and re-oil the DoS filter at this point. Just clean your MAF with some MAF specific cleaner from Kragen, Pep Boys, AutoZone. etc . . . Reset the CEL after that and start 'er up! That should clear-up the problem.

Don't hesitate to call or email if you have any further questions or concerns.

-Clint

 

Thanks Clint, the MAF is clean and drying right now! It may not be the official translation, but if I ever see that P115C code again I'm cleaning the MAF. BTW, I finally got on it hard enough to open that butterfly valve. YIKES!!!

 

 

I learned something I consider very important from my tribulations with the DoS install and the resultant CEL mystery code (P115C). KEEP THE MAF SENSOR CLEAN (see below)!! Mine had 30K miles on it before it threw that code. Apparently the crud build up is very gradual and you don't really notice the power/efficiency loss until it throws that code. Before that, it's sending the wrong info to the computer. Garbage in, garbage out! When I test drove mine after cleaning, the power increase was sudden and dramatic. Mine's getting cleaned every 10K from now on.

MAF Sensor Cleaning: There's only one way to do it right after removing from the car. First off, don't touch anything inside the housing with anything else, not even the applicator tube of the solvent can. Use only a cleaner that says it's for MAF Sensor cleaning. I used CRC's MAF Sensor Cleaner, ~$7 at Kragan. Anything else could wreck the sensor and that puppy ain't cheap. The dealer pays $400 for it! Let the sensor dry for 20-30min. and re-install. BTW, I dug this info up from deep in NAM's archives. Worked for me!

 

Hmm, this makes me wonder if I should clean my MAF sensor. I am only at 10k miles right now.

 

Cleaning mine as we speak...

Your post made me think it would be a good idea....never been cleaned, 41k miles, most of which was with a oiled K&N on it. Think I'll add this to my normal SeaFoam routine in the future

 

ROTFL!! I just finished a triple SeaFoam treatment. 5oz for 5 min. with a 1hr soak each treatment. What a difference! No idling noise now, just a very quiet purr and no stumbling on launch either. What should we clean next? LOL
PS: Could you tell us what cleaning the sensor did for your car's performance?

 

It's definitely a MAF code. Always clean the MAF frequently when going to a oiled filter or you'll eventually ruin it.

 

It just made everything smoother it seems.

 

I just got my first Mini in Dec 2010 it's a Cooper S Manual 2007 -- my dream car and it is beautiful!! Saturday my check engine light just came on. I took it to BMW who said they can't run a diagnostic on a Mini and I have to take it to a Mini dealer... well, that's 50 miles away so acting apon advice from a friend I took it to Autozone and they ran it... and it came with code P115C. I've read here that it could be the MAF sensor. Does anyone know if that is covered under the warranty? I don't know if I should just take it up since it's still under warranty for a few more months or if I should just get the cleaner and do it myself.

I'm under a serious time crunch because I have to leave first thing Tues morning for my Uncles funeral, it's a 3 - 31/2 hour drive and I don't want to do more damage or become stranded by waiting until after I get back so I'd like to get started on this ASAP. Thanks in advance for your responses. Any other newbie advice is greatly appreciated. I'm going to go browse this site now.

 

man im glad I don't have a MAF, what a pain in the ***.

 

I think we do

 

nah the jcw stage 1 got rid of it for me.

 

really? any photos? I never knew this was the case!

 

i will email you some on the weekend etalj

 

thanks mate. (It's St00ge off mini-mods by the way)

 

Just an FYI, I have this p115c code. I tried cleaning the maf with no luck. I then replaced the maf sensor ($225 on rockauto). This didn't resolve the cel for me either so it seems this code isn't always related to the maf.

 

Reading from the new Bentley Service Manual for R56 . P115C - MINI-Code 02775 - Mass or Air Volume Flow 'A' Too Low.
Its not saying that you have to replace the MAF Sensor. It's suggesting you find out why the Air Volume flow is low.

In my case when installing an aftermarket Air filter, it was necessary to turn the Sensor to a position that had the connector horizontal to the engine.

 

I also got a CEL P115C on Saturday. It was right after I emptied my BSH Catch Can that morning so I first suspected that. I also cleaned and oiled my K&N filter three weeks ago for the first time. I've seen threads on here on both these procedures might lead to this odd CEL.

I emptied the CC through the dip stick hole with a tube and suction like I usually do so I thought maybe the dip stick o-ring was loosing vacuum. That might be a stretch but I added some teflon to help seal it just in case. I also blasted the MAF with MAF cleaner.

I cleared the light and it hasn't come back in two days of driving. I guess one of the two fixed it.

I still have searching idle with the climate control on and in 1st in pseudo-sport mode in the automatic at a stop light. It doesn't do it in 2nd or with climate off in 1st. I hoped cleaning the MAF might help with this. It did not. At least the CEL is gone!

 

Spoke too soon. Light came back on this morning sitting at my first stop light. I cleared and and the idle changed. I'm going to re-clean and lightly oil the K&N filter this weekend to see if that helps.