Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









Search Auto Parts

need some help with possibly faulty sensors


  Email This Post



ni5958
New User

Apr 21, 2013, 5:12 AM

Post #1 of 6 (1260 views)
need some help with possibly faulty sensors Sign In

hi,
my car is a hyundai getz 2004 automatic , 1600cc , gls, about 100k km .
a few weeks ago my check light came on and about a week after it got off
i took it to the hyundai garage and they told me i have a faulty map and front oxygen sensors and asked for a ridiculous amount of money(in my opinion) to repair it.
i decided i could probably buy the sensors and replace them myself for much less. so to start i've bought a 8$ code reader . but my code reader gave me a p0112 error code which indicates a problem with iat sensor as i've found out on the internet.
i think i am noticing about a 10-20% decrease in the fuel consumption in the last few weeks so i guess at least one of the sensors is bad .
after a little searching on the net, i've found out that the iat and the map sensors are a single unit in my car.
after that i used my obd 2 reader to try and get some more information about the sensors.
while the engine was warm enough (about 85c) i got the following info :
oxygen sensors - the automatic test of the obd 2 software indicates that everything is o.k,
the voltage reading seems fine, it jumps around between the normal values at all time .
intake pressure - this also seems fine , at 0% throttle at idle i get about 35kpa and at full throttle about 95kpa.
intake temp - almost everytime i tested it, it was fine ,i got values a little bit more than the ambient temp , however , one time when it was rainning hard
i got -30c while the outside temp was around +20c .

so my question is, what do you think is wrong with the car ?
as it seems to me, maybe the iat sensor is faulty which means changing the map sensor ?
and why did the hyundai garage also told me the o2 sensor is bad ? is there something i missed with my testing ?
by the way , a couple of days after the last time i checked and the code p0112 error disappeared .
i would appreciate any help , thanks.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 21, 2013, 6:33 AM

Post #2 of 6 (1231 views)
Re: need some help with possibly faulty sensors Sign In

This is not a US sold vehicle and we have no info on it.

I seriously doubt that an IAT is built into a MAP sensor. A MAF sensor would make more sense.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Apr 21, 2013, 6:34 AM)


ni5958
New User

Apr 21, 2013, 9:34 AM

Post #3 of 6 (1204 views)
Re: need some help with possibly faulty sensors Sign In

mechanically its very much like the accent,
also i'm not sure it has a maf sensor


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 21, 2013, 9:38 AM

Post #4 of 6 (1198 views)
Re: need some help with possibly faulty sensors Sign In

Like I said, I have no info on the car but i can tell you it would be pretty difficult to read intake air temp through a component that is connected to nothing but vacuum line.

IAT sensors are built into MAF sensors, not MAPs.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



ni5958
New User

Apr 21, 2013, 9:54 AM

Post #5 of 6 (1194 views)
Re: need some help with possibly faulty sensors Sign In

ok thanks anyway .
in general, would you guess its a problem with the iat sensor ?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 21, 2013, 9:56 AM

Post #6 of 6 (1191 views)
Re: need some help with possibly faulty sensors Sign In

We don't guess. We test the circuit to determine the problem. The code merely means there is an issue with the circuit. It could be the sensor, the computer or any related wiring.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







  Email This Post
 
 


Feed Button




Search for (options) Privacy Sitemap