Celica Forums General Discussion General who has a check engine light on after intake?

This is a continuation of a post I did earlier, but I'm just wondering how many of you had your check engine light come on when you put an aftermarket Intake on it? (i.e. injen or aem, ect.). The codes on mine are P0125 and P0171 (O2 sensor and engine coolant temp.). Anyone else have this problem?

Now don't everybody answer all at once or anything...

pretty common...clean ur MAF sensor...should solve things right up

^^^ yah agreed i'll see if i can find the thread that says how you clean it

wooo whoo found it..

Cleaning the MAF Sensor

thanks!

I had the CEL go on even tho I disconnected the negative battery terminal before I started. Make sure all hoses and ports are plugged.

its amazing what a BIG difference it makes when ur MAF sensor is dirty...your throttle response get sooo fugged up..

^^^^ I've been thinking of doin that for ages. Lately everyone is talkign about cleaning the MAF. I have Injen RD cold air and have never had a CEL but I think I might do it anyway.

I just bought an Injen SRI and have the cel (p0171) light come on. it goes away than comes back sometimes and i've cleanend MAF, throttle body, ran fuel injector cleaner thorough, and cheked all hoses.

I think the 0171 code is because of the Intake. If the Intake is cold-hence "cold-air Intake", it makes the computer think that there is a hole in the Intake so the check engine light will come on. If this is the case, the light will come on during cool nights. (too much cold air). It doesn't hurt the engine, it's just specified in the computer to tell you when something isn't "factory". I've driven mine like this for 2 years and it's been okay. I'm just because the computer is saying the O2 sensors are bad, and I just put brand new ones on them!

I've had mine on since oct. i kept reseting the cpu but it came back on. so i gave up.

Interesting that most of (not all) the problem posts are from Injen owners, one K&N in there. Is there less of a problem with AEM owners.

I wonder if the placement of the MAF sensor has something to do with it? On Injen and K&N the MAF sensor is fairly close to the throttle body, but on AEM this is not the case. AEMs placement of the sensor is much farther out on the pipe. hmmmmmmmmm.

ive heard that k&n uses oiled filters and thats what trashes the maf, Is this true?

I've read those posts to, I think those people are using to much oil, even if they don't know they are. TRD filter is made be K&N so it works the same way, I've never had a problem. You should use a small amount of oil and let it wick through, spot oil any missed areas, not go all crazy with it.

If your CEL is still on you can try to disconect you battery for about 5-10min and your ECU will reset itself.

yeah, I have a code reader, so I keep erasing it-