× 1-800-946-2642 Home My Account Social / Forum Articles Contact My Cart
Shop Now
Select Your Car Type Sale Items Clearance Items New Items
 

 P115c cel

 Created by: GenericNameUser
Orig. Posting Date User Name Edit Date
Apr 11, 2017 05:12PM GenericNameUser  
Apr 11, 2017 06:10AM kenatminimania Edited: Apr 11, 2017 06:13AM 
Apr 10, 2017 07:24PM GenericNameUser  
   Forum Width:     Forum Type: 

 Posted: Apr 11, 2017 05:12PM
Total posts: 2
Last post: Apr 11, 2017
Member since:May 18, 2016
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
Hi Ken,

Shes got a rough idle, kind of "loapy," if thats a word, will maintain around 800rpms for a few seconds and then bog down and quickly drop to around 400 and then spike to about 1400, and then level out again, but runs fine under load.

My obdII reader will not meter LTFT but it does show STFT and the short term is always in the negative, when she drops idle the short term will spike at around -15. Meaning shes flooding herself with fuel to try to level out to 0.0 right?

I have done the walnut blasting on the valves, which was a waist of $450 because 4 months later had the whole top end replaced because of a leaking head gasket. 

I'm going to replace the MAF sensor next week.

Hopefully that will solve the issue. If not I will try the smoke. Would a fog machine work for that?

 Posted: Apr 11, 2017 06:10AM
 Edited:  Apr 11, 2017 06:13AM
Total posts: 2271
Last post: May 23, 2023
Member since:Dec 29, 2004
Cars in Garage: 1
Photos: 9
WorkBench Posts: 0
Quote:
Originally Posted by GenericNameUser
Hello Forum,
09 R56 S Hatchback 

I've been troubleshooting this code for about 8 months now. I've looked over dozens of forums and it doesn't look like anyone has a specific fix for this code. P115C my repair shop said his reader says "unmetered air" but he has no idea what it actually is. Ive taken off my CAI and cleaned my MAF sensor with the appropriate cleaner, I've checked my pipes, hot and cold sides, vacuum lines are fine. I can't figure this out. I live in California and have a smog check coming up in September. But I would really like to get this fixed as soon as possible.

Any help would be greatly appreciated. 
Have you tried a smoke test to see if there are any leaks in the intake system?

How does the car run aside from the error code?

Possibly a defective MAF sensor (hot file air mass meter)?

Ken

 Posted: Apr 10, 2017 07:24PM
Total posts: 2
Last post: Apr 11, 2017
Member since:May 18, 2016
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
Hello Forum,
09 R56 S Hatchback 

I've been troubleshooting this code for about 8 months now. I've looked over dozens of forums and it doesn't look like anyone has a specific fix for this code. P115C my repair shop said his reader says "unmetered air" but he has no idea what it actually is. Ive taken off my CAI and cleaned my MAF sensor with the appropriate cleaner, I've checked my pipes, hot and cold sides, vacuum lines are fine. I can't figure this out. I live in California and have a smog check coming up in September. But I would really like to get this fixed as soon as possible.

Any help would be greatly appreciated.