View Full Version : After AFE intake install: Check Engine light. Please help.
Just installed AFE intake. 20 miles later I got the check engine light. Saw in a previous thread some one said the MAF sensor is not hooked up right then but the poster never replied and said it work for him. Can any one give a list of what to do and tell if this has worked for them please. I will be trying to figure this out tomorrow.
Thank you.:help:
djct_watt
11-24-2011, 04:23 AM
I had something similar happen when I installed my intake. Try checking all your connections and that there are no leaks, especially near the MAF. If everything checks out ok, try resetting the ECU by pulling the ECU fuse and turning the key to on for a few minutes. Put the fuse back, and start 'er up. Alternatively you can disconnect the negative battery cable for a minute or two.
Either way, when I reset my ECU, it got rid of the check engine light.
goliath1812
11-24-2011, 10:19 AM
If you installed it with the MAF gasket, take the gasket off. That worked for mine.
thanks guys i'm gonna try both suggestions today.
Adjusted some clamps, loosened and retightened all clamps.
Checked, engine light still on.
Uninstalled and reinstalled MAF, and gave it a little more slack by disconnecting a cable tie down.
Checked, engine light still on.
Then I unplugged the negative cable for two minutes and reconnected it.
Checked, engine light is off.
True test will come over next couple days driving.
Thanks I hope it stays off. :-)
WeeYari
11-24-2011, 04:31 PM
Fingers crossed for ya. Probably was a MAF leak as that is usually the most common culprit.
You should have disconnected the battery first as that is what cleared the code. Then proceeded with your trouble shooting. Fixing an issue does not clear a code on its own.
Ohhh thanks, I will keep that in mind.
Check engine light came on a week later. I took off maf gasket then and restarted computer by neg term disconnect. Light stayed off for one day then it came on again. The next day I start car and light is magically off already. Should I spray ether at connection points and listen for revving?
enviri
12-04-2011, 10:24 AM
I had the same issue. i had to do something drastic and made sure there's no air leaking through the maf hole. I REALLY dont recommend it, but i had a few mafs in my house and used sealant.
I loved the intake design, except for that one stupid maf mounting flaw. Also check if the metal cylinder part where you screw into isn't loose or coming out of the molded plastic. if it is, epoxy or superglue that cylinder in.
Captain Slow
12-06-2011, 11:25 PM
If any air at all is getting in between the maf and throttle body the unmetered air can cause CEL issues.
Also check if the metal cylinder part where you screw into isn't loose or coming out of the molded plastic. if it is, epoxy or superglue that cylinder in.
Which metal cylinder part do you mean?
This problem happens most when I have cruise control on and I'm going uphill at anywhere from 45 to 65 mpg.
Hey guys, I got a new tube for free when I complained to AFE. Since I'm still having the problem (although it randomly comes and goes) I am gonna install it. I'll let you know how it goes.
Hello, Well that last tube they sent me was the wrong one. They've sent me a third one with a gasket too now.
BUT - when I was waiting for the newest one I removed the white spacers that where originally provided. These held the MAF up and out of being flush in the tube's hole. That was January 1st. It took about a week for the light to turn off after doing that, and the light has stayed off ever since AND I'm noticing better gas milage by two miles better.
... so I havn't even thought about installing any of the newest stuff they sent me, not unless the light comes back on.
Is anyone still checking this? Cause I'll keep you posted. I look at this as an experiment now.
yaris4062007
01-26-2012, 10:38 PM
Yes ;)
hey so i installed an afe intake too and im having the same problem where the CEL will come on for a day or two then go off and then come back the next day...
so you said you took out the white spacers and that worked right?
did you take the washers out too or just the spacers?
and did you run in to any more problems with it?
Hey catliek,
I can't remember if I took out the washers too. If they were in the same place as the white spacers then I probably did. I did this because it sealed the opening where the MAF fits into better. The MAF body sits flush against the tube when you do this.
Here's what happened. The light stayed off for about a week and a half, then came back on ... I left it alone and it turned off in about three or four days by itself. Next it stayed off for like a month, then it came back on for like two days. Then it stayed off for like a month and a week and came back on for less than a day. It's been off since.
I think it is working fine. I don't know if it needs to adjust itself, but I think that it is reaching a point of hysterisis or something.
enviri
03-16-2012, 11:59 PM
Which metal cylinder part do you mean?
This problem happens most when I have cruise control on and I'm going uphill at anywhere from 45 to 65 mpg.
the metal cylinder is covered by the black plastic. its where the screw goes in when you mount the maf.
are you still keeping track of your gas mileage? You are the second person to report better gas mileage after adding an intake, makes me want to get one, but i have no idea about that type of thing.
I installed an afe intake with no instructions and using the tips Goliath gave you. I have had it for like 2500 miles or more and no CEL.
Hey everyone. Sorry I haven't been on for a while. I have been keeping track of gas milage on every fill up and I want to post it in August. I don't know how I feel about it. Are you less likely to get good gas milage in the summer? Cause my milage is sometimes bad lately. Also, the light thing is off... but it does still come on rarely (like for a two days at a time every two months)
here's how it mpgs went from 10/21/11 to now...
With regular air filter
33.69
34.9
30.03
32.5
34.63
32.05
33.3
32.8
ave mpg = 263.9/8 = 32.988
Then on new years day I put in the new air intake and one inch smaller wheels (from 15s to winter 14s)
35.24
33.6
34.52
30.9
33.1
32.04
36.92
36.66
35.4
33.8
35.75
36.12
35.28
36.29
ave mpg = 485.57/14 = 34.68
Half way before this fill up I put the 15s back on (approx 4/7/12)
33.1
Then the rest are with 15s on
35.06
34.08
34.3
33.99
37.01
37.41
32.8
36.8
33.99
33.984
34.28
30.88
33.25
33.8
35.22
33.14
34.495
32.007
ave mpg = 616.406/18 = 34.24
It looks like I am getting greater than a mile per gallon gain on average.
Lets say gas is 1 gallon = $3.75
$3.75
1/34 = .029
I would say I am getting back 2.9% of every gallon... .029 * $3.75 = $0.11 saved on every gallon on average... I spent $162 and time on the air intake system ....
$162/0.11 = 1472.72 gallons needed to make my money back... in the month of April I used about 41 gallons of fuel...
1472.72/41 = 35.92 months or 2.99 years, that is I need to make the car last 2.99 years after January 2012 to start making money back ... unless I can figure out a way to make it work better all the time.
I have 65K on the car now and in the month of April I drove 1,418.8 miles. Taking that as average, I approximately drive 17,025.6 miles a year. Car will be at about
(17,025.6 * 3) + 65K = 116,076.8 miles after that....
I gotta make it last a while after that to make any money back.
So, do you think it was worth it for me to buy the air filter? By the way, the Check Engine Light still comes on for a couple days every once in a while... I think I am going try spraying carburetor fluid soon.
Im averaging between 34-36mpg , but with tons of mods including the supercharger and with a bigger wheels setup.
you may want to go to a local advance autoparts when the CEL is on and borrow their CEL code scanner .. and go from there.
I just realized I made a few mistakes... the three years started January 1st so the milage I put on from then til now will have taken away from how much milage I said I would have on the car at the end of three years ... also I should've worked with more like 1.4/34 not 1/34 ...
Please let me know if you think I made any other mistakes ... or if your interested I could supply you with the miles I went for each fill up too. I got kind of lazy and went for more of a broad approximation I guess.
SAV912
08-30-2012, 12:47 AM
Also try some MAF sensor cleaner. I didn't get a CEL for over two months when I first installed my AFE, white spacers and all, but then after all the damned heavy rain we've had here in Georgia lately, the CEL came on and triggered P0101.
That same day I took the spacers out, cleaned the MAF again with sensor cleaner, reinstalled and haven't had a light since, and that was over 2 tanks of gas (~600 miles) ago. The CEL light was on for me for a total of less than 30 miles.
-C
DJYojimbo
08-30-2012, 12:52 AM
Installed AFE intake tuesday night without white spacers and removed the negative battery! Only had a cel when i did not remove the negative battery but after i did, no more cel and we beat the engine to try to throw a cel and nothing :) Ps installed on 2012 yaris :) Thank u to all the advice here on Yarisworld!
Shroomster
08-31-2012, 10:59 AM
Installed AFE intake tuesday night without white spacers and removed the negative battery! Only had a cel when i did not remove the negative battery but after i did, no more cel and we beat the engine to try to throw a cel and nothing :) Ps installed on 2012 yaris :) Thank u to all the advice here on Yarisworld!
What partnumber are did you install? Is it the one for the 07-up yaris hatch?
DJYojimbo
08-31-2012, 11:04 AM
Yes i believe it was because my cousin works for toyota and was looking for at the instructiions was like this isn't for the 2012 yaris but he made it work anyway. I'll take a picture of it and post it on here later. Ps i read here that it didn't matter what year because they fit and i believe them and the advice that people give here are honest advice. My car has an intake and works great!
DJYojimbo
08-31-2012, 11:05 AM
Oh and this is the part number 51-11302
suckerface
08-31-2012, 01:04 PM
+1 on the MAF cleaner, will work wonders, even w/o the intake. And it's cheap, too!
DJYojimbo
09-01-2012, 06:56 AM
Here's my pics! :)
DJYojimbo
09-01-2012, 06:57 AM
sorry about the 2nd pic i thought i fixed it
auxmike
09-01-2012, 01:01 PM
I think those oiled filters can cause havoc on the MAF sensors too. I had this AFE intake too, but found when it rains or when you wash the car water shoots onto that black metal pan. I'd recommend a gasket like Garm used to sell that seals off the hood gap...
cali yaris
09-01-2012, 02:46 PM
I'd recommend a gasket like Garm used to sell that seals off the hood gap...
We still sell it. :wink:
http://shop.microimageonline.com/Hood-Seal-Yaris-hs-ys-1.htm?categoryId=-1
cali yaris
09-01-2012, 02:47 PM
anyone drill a couple of small holes in the bottom of the AFE airbox for drainage?
DJYojimbo
09-01-2012, 03:02 PM
haven't experienced rain yet but i did have a carwash recently with no issues. Might get the gasket from Garm just in case
catliektheif
09-01-2012, 05:13 PM
I think those oiled filters can cause havoc on the MAF sensors too. I had this AFE intake too, but found when it rains or when you wash the car water shoots onto that black metal pan. I'd recommend a gasket like Garm used to sell that seals off the hood gap...
but its a dry filter.
also i bought the hood liner and it helps with the rain.
OP is your cel still coming on?
Astroman
09-22-2012, 06:15 PM
Please try to post your threads in the correct thread section. It's getting old moving all the stuff from the "general discussion" when this was service related. I've moved it to the proper sections :thumbsup:
I haven't gotten an email from yarisworld in a while. Yeah the CEL will still come on like once a month for a couple days at a time. I took it to Advanced and checked it with their device. It said it was the MAF sensor. I'm gonna try the MAF sensor cleaner. I'm also planning on using cleaning my carburetor and fuel injectors soon for good measure.
Just wanted to mention I am starting to try to not use cruise control when going up hills anymore to see if I get higher mpg. I installed cruise around the same time I installed the air filter.
swidd
10-09-2012, 07:06 AM
I installed mine, got a code. Took off the spacers and re-seated the MAF seal with more care. No code for 200 miles, then all the sudden going uphill in fifth gear, it CELd again.
The way I installed the PVC hose it was pushing the Z-connector on the intake and creating an opening in the rubber gasket. I took some JB weld and permanently glued it on with a total cemented seal. No codes for 100 miles, even when going uphill with cruise control. It finally made a slight difference in MPG too -- had no change on the first fill-up.
Bought carburetor cleaning fluid, cleaned my air intake butterfly per some youtube videos. It looked very clean before I started though so I think it was a waste of time. I could not figure out how to open the butterfly to clean behind it so I had my dad spray a little in there while I got in and gave it gas. CEL light is still on. If it goes out and comes back on again I am going to have to buy MAF sensor cleaner and try that.
Ok well the carburetor cleaner worked for like a day but then the CEL came back on and it stayed on for a long time. So I used some fuel injector cleaner and the CEL went off again. It only stayed off for about two days and then it went back on for a long time.
Finally I bought MAF cleaner. Sprayed the heck out of my MAF sensor, and it works well! The CEL light has been off for at least a week now. Once I quit using fuel perks and loading up gas tanks, I am going to calculate my new fuel economy. The MAF cleaning didn't work right away. It takes a little bit for the sensor to get used to being clean and also it might even make the CEL come back on for a tiny bit after it has gone off and then finally stay off.
SO in conclusion, I'm feeling confident that the MAF sensor cleaner was the way to go. All videos I watched say to not use carburetor cleaner on your MAF btw! I'd recommend cleaning the MAF sensor every once in a while now that I understand it can mean the difference in your car getting better gas milage too. (probably every other time you clean your filter would be fine.) So I'm happy right now. If you are having the CEL problem, buy MAF cleaner and follow a youtube video. It's as easy as spraying and letting dry. It only costed about $7 a can I think.
Almost a month later and still no CEL. Engine doesn't seem to be so loud anymore too. Cleaning the MAF with MAF cleaner seems like it did the trick. Will figure out if the mpg got better soon.
Still no CEL so that is good. ... I have not been getting very good mpg lately. I will try cleaning the air filter even though I don't think it is that dirty.
Hi,
The CEL came back on about a month and a half ago and has stayed on. It went off for maybe a two day period about three weeks ago. But you could say I'm back to where I started. I'm feeling like I'm not sure if it was not worth it to install this AFE air filter and intake system. Especially since I haven't even seen any overwhelming gains in fuel efficiency.
I checked the codes last week and had two. One was MAF again and the other was air temperature sensor. I decided to try cleaning the MAF sensor since I already have a can of MAF cleaner. Since it turn the light off, I thought I would try replacing the air temp sensor today as it was less expensive than the MAF.
I went to my store and used the machine to read the codes and it only gave two this time for the MAF and none for the air temp sensor. I had them order me an MAF and will try it out on Thursday. I have to pay $50 and then get it back when I return the bad one.
I just cleaned the contacts of the MAF connectors with electrical contact cleaner and am waiting for them to dry now. Hoping that works so I don't have to buy the MAF sensor.
Just out of curiosity, could someone please post a link to show where the air temp sensor even is as I spent some time looking but don't think I found it. I saw a picture of it on my store's computer so I know it isn't part of the MAF sensor.
Any advice is appreciated also.
Thanks,
Mike
auxmike
04-21-2013, 04:34 PM
I thought the air temp was but into the MAF.
I've read that on some websites, but they were able to pull up a separate part on their computer at Advanced Auto parts. The first time I had them pull up the part a week ago it was supposed to be like $11.99. The one they showed me on the computer today would be like $17.99.
You're probably right though...
auxmike
04-21-2013, 04:50 PM
Can you snap a pic of what that part looks like? I'm curious...
I will try to get them to bring it up on the computer again when I go back and take a picture.
auxmike
04-21-2013, 04:57 PM
Cool! Mabye it's a water temp part, dunno..
I installed mine, got a code. Took off the spacers and re-seated the MAF seal with more care. No code for 200 miles, then all the sudden going uphill in fifth gear, it CELd again.
The way I installed the PVC hose it was pushing the Z-connector on the intake and creating an opening in the rubber gasket. I took some JB weld and permanently glued it on with a total cemented seal. No codes for 100 miles, even when going uphill with cruise control. It finally made a slight difference in MPG too -- had no change on the first fill-up.
I'm considering this also... where is the Z-connector?
Is the Z connecter the small black hard plastic tube that is an elbow?
Cool! Mabye it's a water temp part, dunno..
I don't think so, as it was called air temp sensor.
Exiwolfman
04-21-2013, 09:10 PM
anyone drill a couple of small holes in the bottom of the AFE airbox for drainage?
Just get a air filter cover , i have used one and its fantastic keeps water off and dirt too with out performance loss and its like 20 bucks.50509
50510
attickt
04-22-2013, 03:42 PM
do any of you have any pics of the white spacers you speak of, i have been getting check engine light on and off ever since installation of my AFE....im sure i can figure out these spacers but a pic would help....
nookandcrannycar
04-22-2013, 08:59 PM
do any of you have any pics of the white spacers you speak of, i have been getting check engine light on and off ever since installation of my AFE....im sure i can figure out these spacers but a pic would help....
That quote from brg88tx is hilarious.
do any of you have any pics of the white spacers you speak of, i have been getting check engine light on and off ever since installation of my AFE....im sure i can figure out these spacers but a pic would help....
I don't have a picture but I can describe them. There is quantity of two of them. They are cylinders. I believe they are each a little less than 1 cm in diameter. They are white in color. They are probably less than a cm long also. The location that the MAF instructions tells you to put them in would be surrounding the screws that hold the MAF sensor in place, so they go in between the sensor and the hard black tube that came with the AFE system right where the screw holes are.
If my MAF sensor is truly bad, and I replaced it with a new good sensor, how long should it take for the CEL to turn off?
If I am currently driving with a bad MAF sensor, what kind of negative side effects can that have on my car?
If I am currently driving with an air intake system that is faulty, maybe letting air in somewhere besides through the filter, what kind of negative side effects can that have on my car?
Thanks.
YarisSedan
04-25-2013, 03:15 PM
If my MAF sensor is truly bad, and I replaced it with a new good sensor, how long should it take for the CEL to turn off?
-depending on how many miles you drive it should take about a week once the computer detects the fault is gone after 2 drive cycles
If I am currently driving with a bad MAF sensor, what kind of negative side effects can that have on my car?
-loss of power, fuel economy, can potentially damage catalytic converter if driven long term, typically you will feel a difference before this happens.
If I am currently driving with an air intake system that is faulty, maybe letting air in somewhere besides through the filter, what kind of negative side effects can that have on my car?
-See above typically reduction in fuel economy, 02 sensor will pick up the extra oxygen and attempt to correct the vehicle by dumping more fuel in the cylinders leading to incomplete combustion so reduction in fuel economy the unburned fuel will get cleaned up by the cat but long term can cause it to fail typically if driven for many many months this way.
Thanks.
...
I am going to put my original air intake system back in before I buy a new MAF sensor.
Do you guys think I should take off the negative battery terminal for a couple minutes and see if the CEL comes back on, or do you think I should not take off the negative battery terminal and wait and see if it clears itself?
djhuddy2442
04-25-2013, 05:38 PM
i replaced my seal gasket to a bigger one to make sure it was snug and maybe disconnect your neg terminal for a couple mins that could have thrown the check engine light
I just put the original intake back on and will remove neg term for a little while. then will drive for a month to see if CEL comes back on. If not would you agree the MAF is fine?
tooter
04-25-2013, 06:47 PM
I just put the original intake back on and will remove neg term for a little while. then will drive for a month to see if CEL comes back on. If not would you agree the MAF is fine?
That's an excellent test... :thumbsup:
...as it will definitively indicate whether the issue is with the intake itself or with the MAF. Do keep me posted as to the results.
OK I will. 10 miles so far and no CEL light...
My OEM air intake system is not causing the CEL to come on and my gas milage seems to have improved but it hasn't been long enough to say for certain. Has anyone ever sprayed ether or something else around their air intake system to try to find a leak?
YarMatey420
02-16-2014, 11:02 AM
I already purchased the afe intake from garm at microimage , but the instructions that came with it said that the intake is for 2006-2007 yaris. I have a 2008 . Will it still fit ?
Exiwolfman
02-16-2014, 11:20 AM
I already purchased the afe intake from garm at microimage , but the instructions that came with it said that the intake is for 2006-2007 yaris. I have a 2008 . Will it still fit ?
Yes...should fit even in the 2012 up
We still sell it. :wink:
http://shop.microimageonline.com/Hood-Seal-Yaris-hs-ys-1.htm?categoryId=-1
"Imported from New Zealand" Omg. I need this. But doesn't it seem somewhat impractical to buy something from USA and have it shipped back to the country of origin :P
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