Map Sensor & Cheap Air Filters

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wolf_06

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The service at my hyundai dealer told me to use only genuine hyundia air filters, because cheap filters can lose some fibers material and mess with the map sensor, as well as those fram with oily filters I should stay away from.

I put a regular fram tough guard I think (but not sure) recentlry and my CEL came on and I cant put my finger on the problem. Its a lean mixture p2096.

btw I got two new O2 sensors
Can I clean a map sensor??

Any explanation for this, experiences, advice?
 
You can clean a MAF sensor and I can see how that would be affected by contamination, and in fact they generally have a cleaning cycle.

A map sensor I doubt would get dirty as air doesn't flow through it, it just senses pressure.

I'm not sure which you have on the car. A new MAP would probably be pretty cheap. If it's a MAF you can buy special cleaner for it.
 
Yeah, its very easy to do a MAF sensor cleaning. Just go buy the CRC MAF sensor cleaner, remove the sensor and use as directed. I just sprayed down mine a few times and let dry for a half hour or so before I reinstalled. Cleaned both my 2008 xB and dads 2010 Prius with no check engine lights or anything like that.
 
Some cars, Hyundai in particular, are known for being picky regarding filter choice. I'd get an OEM replacement and see if the problem disappears.
 
Yeah I put a fram tough guard, and I have a MAP, apparentrly on toyota cars, cheap filters can cause problem with map sensors, I saw that on another car forum.
 
been using aftermarket air and oil filters on the fleet of Toyotas (camrys and corollas)and Mazda MPV for the past 8+ yrs (WIX, Fram, Purolator, etc.), never heard of any issues with aftermarket filters.

Hexk! I'm using Fram toughguard air filter in my fit right now!

Q.
 
Originally Posted By: Quest
been using aftermarket air and oil filters on the fleet of Toyotas (camrys and corollas)and Mazda MPV for the past 8+ yrs (WIX, Fram, Purolator, etc.), never heard of any issues with aftermarket filters.

Hexk! I'm using Fram toughguard air filter in my fit right now!

Q.
good for you, but it doesn't fix my problem
smile.gif
 
Sounds like hogwash meant to keep you buying only genuine Hyundai parts so that they can keep making money off you.
 
Fram should be oK if it appears to fit the airbox well. Ive had problems with wix air filters and Purolator Chinese garbage. I would check for any splits and leaks in ducting from the MAF zone up to the throttle body. I had a rubber duct intake hose on a '91 Mazda 2.2L that would open a split when the engine torqued over - and it was only a year old. I didnt see the split until i dissassembled everything, layed it out and went over all parts with keen eye for trouble and a bright trouble light. Oh, yeah - make sure the airbox is properly clamped - most DYI-ers mess this up.
 
Originally Posted By: L_Sludger
Sounds like hogwash meant to keep you buying only genuine Hyundai parts so that they can keep making money off you.
Only partly, its because many aftermarket parts are penny pinched into being junk. Hyundai have demonstrated engines failure due to garbage oil filters. The Hyundai filters are well made - and fit. Many aftermakers filters have been listed to work on my '08 yaris 1NZFE and NONE fit.
 
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Hogwash-I think not. There are so many brands for uknown countries that eventhoug thay are mad e to specs on paper the production methods are poor. Buying OEM or at least a brand name give some insurane that you are buying a working piece of equiment. Air filter are a good case in point. I alswaws remove and inspect before buying as I have found many wit poorly attacted seals, missing seals and even on has an open gap in the media. Ed
 
Hogwash-I think not. There are so many brands from unknown countries that even though thay are made to specs on paper, the production methods are poor. Buying OEM or at least a brand name give some insurane that you are buying a working piece of equiment. Air filter are a good case in point. I alwaws remove and inspect before buying. I have found many with poorly attacted seals, missing seals and even one had an open gap in the media. Ed
 
It's definitely possible. I've had two Fram CA3902 filters shed lots of fibers onto the MAF screen. I wish I took pictures because no one here ever believes me.
 
Beeperb is correct. The MAP (Manifold Absolute Pressure) sensor does not have air flow through it, it just senses pressure, so it doesn't get dirty in the same way a MAF (Mass Air Flow) sensor does.

I had an issue with my MAP sensor on my Outlook last winter. Apparently these sensors are very sensitive, and pretty much any degradation in signal quality will cause the computer to throw an error code.

From what I learned, there are two main causes of MAP sensor failure.
1)Moisture, or condensation in the intake manifold will cause the electronic components in the sensor to corrode and malfunction
2)The membrane that moves with the pressure in the manifold which the electronic components sense cracks and the pressure equalizes on both sides, and the sensor stops working.

I ended up buying a new sensor off Rock Auto, and replacing it outright. Very easy, and very cheap to do compared to what the dealer quoted me.

I'm not sure how much a "cheap" air filter had to do with a MAP sensor issue, but its always a good idea to buy quality parts. I have not used an OEM air filter in my KIA for some time. Maybe I am running on borrowed time, but something tells me I'm not.
 
Originally Posted By: bigblumer
Beeperb is correct. The MAP (Manifold Absolute Pressure) sensor does not have air flow through it, it just senses pressure, so it doesn't get dirty in the same way a MAF (Mass Air Flow) sensor does.

I had an issue with my MAP sensor on my Outlook last winter. Apparently these sensors are very sensitive, and pretty much any degradation in signal quality will cause the computer to throw an error code.

From what I learned, there are two main causes of MAP sensor failure.
1)Moisture, or condensation in the intake manifold will cause the electronic components in the sensor to corrode and malfunction
2)The membrane that moves with the pressure in the manifold which the electronic components sense cracks and the pressure equalizes on both sides, and the sensor stops working.

I ended up buying a new sensor off Rock Auto, and replacing it outright. Very easy, and very cheap to do compared to what the dealer quoted me.

I'm not sure how much a "cheap" air filter had to do with a MAP sensor issue, but its always a good idea to buy quality parts. I have not used an OEM air filter in my KIA for some time. Maybe I am running on borrowed time, but something tells me I'm not.
what were the symptoms of your bad map sensor??
 
P0296 is not necessarily a lean mixture. That is a post catalyst code. It could be a exhaust leak or bad cat among other things.
 
Originally Posted By: wolf_06
what were the symptoms of your bad map sensor??


Its hard to say what the symptoms of the bad MAP sensor were, as the car went from working fine to having a problem almost instantly.

In my reading on the subject, MAP sensors can cause rough idle, misfires and hesitation when accelerating.

In the Saturn, without warning,the Check Engine Light came on, which was immediately followed by a warning on the DIC "Service Traction Control/Service Stabilitrak" The car then went into a "safe mode" where the transmission shifting and engine performance got all weird.

I took it to the dealer thinking I had a transmission problem. The next day I got a call from the dealer saying it was the MAP sensor, and would be almost 300.00 to replace. I declined and decided to replace the sensor myself.

When I picked up the car, I asked about the Traction Control/Stabiltrack warning. The service manager said that the computer puts the car into a "safe mode" gives that message on the DIC anytime there is a problem with the engine, or any of its sub-systems, and that it's no good in diagnosing problems.

Some say the car is "Too smart for its own good." I say GM has it coded that way to scare you into taking it into the dealer.
 
I agree that the parts guy is BSing you. They have one objective, to sell you as many Hyundai parts as possible.

As long as you use a well known brand like Purolator or similar, you'll be just fine.

There might be the odd issue, but it is VERY rare. Almost unheard of.
 
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