check engine code P0120

[toshi128]

Has anyone here got the same problem??? It's the P0120, Throttle Position sensor malfunction.

 

[ProjectGSX]

What exactly is your question? That is a pretty specific message. The TPS is probably having issues of some sort.

 

[toshi128]

as my question reads, i was just curious if this is a common problem other people have/had.

 

[swordfish]

Not a common problem.

jeff

 

[RedTurboEclipse]

sorry to bring htis back up.. but i have this same code come up recently. I don't know what to do. Any info would help.

 

[RedTurboEclipse]

hmm, i replaced my tps and the CE light would still come on giving the same code.

for those who get this CE code, do you guys have your bov vented to the atmosphere.

because its weird. i never got a CE code until i changed my upper ic pipes and put aftermarket bov vented to the atmopshere. now, just recently i helped gotEclipsed (here on the boards) install his aftermarket bov as well. it is also vented to the atmosphere. and after that, now HE HAS THIS SAME CE CODE. toshi, your greddy type s is vented to the atmosphere as well right? and you have this same code too, and no matter what you do to fix it, it comes back on.

i dont know how this all could relate together, but all 3 of us have our bovs vented to the atmosphere and we get this code. could this be the reason why? and if so how could it mess up the tps by venting to the atmosphere? toshi, you have a greddy type s which u can easily vent back to the intake, me and james (goteclipsed) have hks ssqv and we dont got the recirculation piece to vent it back. so can you try and vent yours back to the intake and reset the code and see if it comes back on.

 

[echo]

i have always heard it's not as good to vent to the atmosphere. maybe that could be your problem?

 

[whitegst]

I have the same problem too. Dealer told me that i need to replace the TPS, but others said that it's b/c of venting BOV to the atmosphere.
Don't know who's right/wrong...

 

[RedTurboEclipse]

Originally posted by whitegst
I have the same problem too. Dealer told me that i need to replace the TPS, but others said that it's b/c of venting BOV to the atmosphere.
Don't know who's right/wrong...

well i noticed you have a greddy type s bov? you can easily recirculate yours unlike gotEclipsed and I with our HKS. can you recirculate yours and vent it back to the intake, reset the ecu and drive it for a while, normal driving and aggressive driving, then let us know if the CE light comes on again. then we will know if it's because we are venting.

 

[toshi128]

if it's due to venting, then more people should have the same problem as well. However, this could be the cause, since i can't really solve this stupid problem, even after changing my TPS. I don't mind driving with my CEL, but don't want my car to have other/more damages from this.

 

[RedTurboEclipse]

toshi, did u get my PM? try recirculating ur greddy type s and reset the ecu and let us kniow if u get the CEL again.

 

[whitegst]

hey guys, i replied here also, so just click below:
http://www.dsmtuners.com/forums/showthread.php?s=&threadid=14585

 

[RedTurboEclipse]

Originally posted by whitegst
hmm.... I thought by recirculating back would have solve the problem, but CEL still came on. Damn, don't know what to do other than driving w/ CEL on.

weird, because goteclipsed and myself never had this code until AFTER we installed our hks ssqv bovs and vented to the atmosphere. goteclipsed actucally got a CE light the next day after he installed his hks ssqv. if you know how to adjust the tps to the right specs try that and make sure you recirculate the bov then reset the ecu once again. maybe that will help. its all about trial and error right now. we have to see whats wrong.

 

[RedTurboEclipse]

well the originator of this thread has told me after recirculating his BOV.. he gets no more CE light.. i assumed this was the problem and i was correct.. so if anybody gets this problem right after installing a bov and venting it.. that could be the reason you are getting the CE light..

 

[RuBiCaNT5X]

I just rechecked the TPS threads and I am still getting the TPS sensor error. I am not recirculating so I think it's bad. Have any of you called Mitsu to find out the price of a replacement?

 

[toshi128]

I got an used one from a junk yard for about $25, then put it in, and still got the annoying CEL, same code. Then, recirculated the BOV, then no more CEL.

RuBiCaNT5X: In your post, you said, "I am not recirculating so I think it's bad.". which means you are venting, right? unless, if you had a typo. So, please recirculate your BOV, then see what happens. I did not get any help about that CEL, or not enough definate help to solve the problem, and I tried fixing it, and recirculating BOV was the solution for me. So, give it a try and see what happens, before you buy a new TPS sensor.

 

[RuBiCaNT5X]

Originally posted by toshi128
I got an used one from a junk yard for about $25, then put it in, and still got the annoying CEL, same code. Then, recirculated the BOV, then no more CEL.

RuBiCaNT5X: In your post, you said, "I am not recirculating so I think it's bad.". which means you are venting, right? unless, if you had a typo. So, please recirculate your BOV, then see what happens. I did not get any help about that CEL, or not enough definate help to solve the problem, and I tried fixing it, and recirculating BOV was the solution for me. So, give it a try and see what happens, before you buy a new TPS sensor.

Woops.. I AM recirculating.... Sorry bout that...

 

[RuBiCaNT5X]

Let me get into it further. I can drive my car for about 2 - 3 weeks before the TPS sensor goes off. Right before it does, the car shifts oddly (right into 2nd and 3rd). Idling is also retarded too. Once the sensor is tripped, the car is fine. I don't know if heat is an issue or what, because it always seems to come on after a long distance drive. I figure if the TPS was bad, the sensor would be tripping all the time, but who knows. I need to rip out the TB and clean it. That's my next step.

 

[RuBiCaNT5X]

Ok, new info... I disconnected the TPS and I did NOT get a CEL. One thing that is very bizzar is that the O2 sensor 1 is going bonkers. It goes from 0.04 - 0.62 - 0.94 - 0.02. I'm wondering if it's malfunctioning and that is what is really causing my problem. When it gets hot, it starts giving whacko reading to the ECU and this at non-WOT situations, it sets off the TPS. I dunno, I am new to all this...

 

[toshi128]

Sorry man, i might not be able to help you anymore. Since recirculating was the only solution to the TPS problem I had.

 

[RuBiCaNT5X]

Originally posted by toshi128
Sorry man, i might not be able to help you anymore. Since recirculating was the only solution to the TPS problem I had.

I think I have somewhat alleviated my problem. I cranked down the BOV to about 6 threads showing. I dialed down the boost a tad (I was getting 17 - 18 psi for longer than a split second spike) and it seems a whole lot smoother at lower levels. Not pefect, but a vast improvement. We'll see if it keeps the TPS error from coming on.

 

[erixpulsar]

yup, a coworker gave me a APEXi UICP and BOV, and a few hours after installing them on my 98 gst spyder, i heard a loud pop (code P0302 Cyl 2 Misfire) and then right after, i got the CEL.

went to autozone, borrowed their logger, and pulled that misfire code along with the P0120

i'm goin back to stock bov since i notice a dramatic change in MPG.

and i dont want that CEL light again.

 

[Nick_dsm_talon]

hmm, i replaced my tps and the CE light would still come on giving the same code.

for those who get this CE code, do you guys have your bov vented to the atmosphere.

because its weird. i never got a CE code until i changed my upper ic pipes and put aftermarket bov vented to the atmopshere. now, just recently i helped gotEclipsed (here on the boards) install his aftermarket bov as well. it is also vented to the atmosphere. and after that, now HE HAS THIS SAME CE CODE. toshi, your greddy type s is vented to the atmosphere as well right? and you have this same code too, and no matter what you do to fix it, it comes back on.

i dont know how this all could relate together, but all 3 of us have our bovs vented to the atmosphere and we get this code. could this be the reason why? and if so how could it mess up the tps by venting to the atmosphere? toshi, you have a greddy type s which u can easily vent back to the intake, me and james (goteclipsed) have hks ssqv and we dont got the recirculation piece to vent it back. so can you try and vent yours back to the intake and reset the code and see if it comes back on.

I have my bov to atmosphere as well and the ce light just came on. When I vented it to recirculate the ce light never came on.