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Discussion Starter · #1 ·
Has anyone had a problem with the MAF sensor out of range after installation of any aftermarket air cleaner and is there a fix for the sensor. The sensor is not bad it’s doing what it is supposed to do and the system is alerting me by way of check engine light. I have heard of oil getting on the sensor from the K&N filter so I cleaned the sensor even though it was not dirty and reset the code. It reappeared after two start ups, so I have reinstalled the OEM air cleaner cleaned the sensor and reset the code again. I have driven it only once since but I will give it three days to be sure. I haven’t been able to find any info on line about possible solutions to the problem. Just the recognition of the issue with aftermarket filters. I would like to use the filter but don't want a check engine light staring me in the face all day. Any info would be appreciated, Thanks
 

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I haven't heard of a drop-in filter causing that problem, just the FIPK causing it since it relocates your MAF sensor and the flow of air is higher. You are actually better off staying with the stock filter system. If you aren't pulling your filter minder on a full throttle take-off, you don't need an aftermarket filter or extra air. If anything, just swiss cheese your stock box. Hold your k&n air filter up to the light....if you see pinholes all over, that is the size dust particle could be getting into your engine. That is why I went with the AFE Proguard 7 filter after having a k&n drop-in.
 

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Dose the truck have any other mods done to it? What year truck?
 

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I had same problem with my truck.I took it in to the dealer for the check engine light and they told me that there was "oil on the sensor" from my K&N filter, so they replaced the sensor and installed a stock filter. No problems since that. Seems to me that they could of possibly just cleaned the oil off. I kept the removed K&N and it didn't look like it was over oiled or had exessive oil on it.
 

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Discussion Starter · #5 ·
I talked to the dealer also about the problem and they said the same thing but since I performed the work myself I noted no oil on the MAF sensor but since I have changed it back to the stock filter it has been fine. The sales rep that sold me the truck told me after oiling his K&N he blows it out with air to try and get most of the loose oil out. I havent tried it because without the oil the filter isn't doing its job.
 

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AFE actually has a filter oil that is sensor safe and won't trip the sensor. I cleaned my AFE filter and reoiled it with K&N oil and within a couple hundred miles had a code. I was told by the dealer it was the oil in the filter. After researching I found out there is a difference in the oils used on different suppliers filters, I have since went back to The AFE oil and have not had any other problems with the sensor.
 

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Discussion Starter · #7 ·
Got my AFE oil in today, I cleaned the filter tonight and will reoil tomorrow and test it out.
 

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on my 06 i tried to install a s&b air intake i was getting codes also,then i installed the same box in my 05 dually and it works fine.what box is recomended for the lbz with out tripping codes?

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05 lly dually mods,the mirrors off my 06 2500HD,programmer ppe hot soon to be upgraded to the hot e.t. 2:fart ,ppe boost controller,S&B air intake,dual 4" siverline turbo back exhuast with 5" tip no cats,bully dog shift kit soon to be upgraded to stage v sun coast transmission with triple disc torque converter$$:gearjamin,wish list:teasetwin turbos,dual cp3 fueler,bigger injecters,and so on$$$$
 

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i will disagree on the need for after market intake systems, i thought it made a huge difference in turbo lag. i have never had any problems with the MAF sensor on my 05 LLY. i do understand that the after market filters might not pick up everything that a stock filter will, but you have to take risk vs. performance into mind. think of all the other mods we all do to TORTURE our trucks... isn't that half the fun :)
 

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i guess i didn't think off it quite like that but it's true i'm 19 years old and i do like to have fun

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[SIGPIC][/SIGPIC]
05 lly dually mods,the mirrors off my 06 2500HD,programmer ppe hot soon to be upgraded to the hot e.t. 2:fart ,ppe boost controller,S&B air intake,dual 4" siverline turbo back exhuast with 5" tip no cats,bully dog shift kit soon to be upgraded to stage v sun coast transmission with triple disc torque converter$$:gearjamin,wish list:teasetwin turbos,dual cp3 fueler,bigger injecters,and so on$$$$
 

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Discussion Starter · #12 ·
Well so far since 0520 this morning I have had no codes trip with the AFE oil. But I will give it two more days before I figure it's good to go.
 

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Discussion Starter · #13 ·
Second day and no codes
 

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Discussion Starter · #15 ·
Well it was to good to be true, I set the code today, guess I am just going to have to live with it. At least I can reset it.
 

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The oil is not the problem. The problem is that the sensor thinks there is more air flowing than there should be. Air flow may not have actually been increased, but velocity may have (if you are using a cold air kit). MAF sensors work off of resistance, anything that alters the resistance of the wire that is in the path of the incoming air will change what the computer thinks is happening. So, more air in, less resistance (cools off the wire which lowers resistance). When you add any type of oil or liquid you are going to change that value no matter what the filter manufacturer says. When the computer gets a value it is not sure of...well it tends to throw a code if it stays out of spec long enough or does it often enough. Now here is the kicker, when it does that an arbitrary number is pulled from a table somewhere that fills in for what the sensor "should" be reading. Someone earlier summed it up nicely. If you don't trip your air filter gage doing a full throttle launch, you really don't need any more air for your motor. With the cost of repairs being so high on these motors, I would much rather sacrifice 2 or 3 HP for an extra 30-40k miles of service....wouldn't you?

Here is a little read for those looking at aftermarket filters.
 

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Just had this on my lmm, bought the drop in filter for my stock box. Drove it 10 miles and got p0101. Luckily autozone will let ne return it and get a paper filter. Bought the Kn even though I've read of the problems because t was 5.00 more. Oh well, rather get something that will not fight my truck. Scared me when my truck said reduced engine power. No cel, but my insight read it and cleared it.
 

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Moved-- not a 911 problem
 

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It might be worth changing the sensor, I have heard of people that tried cleaning the sensor and having the same problem until the change the sensor
 
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