DarkSideGT Posted September 20, 2013 Share Posted September 20, 2013 Have codes p0638 throttle actuator control range/performance and p2109 throttle/pedal position sensor a minimum stop performance. Started with the first code and would not let me clear the code. So for shits and giggles i diconnected the accelterator pedal connector and reconnected it. It would allow me to then clear the code. I get to drive it for 3 drive cycles and on the fourth time the minute i start to drive the cel comes on and i lose throttle. Did the same thing wit diconnecting and reconnecting the pedal connector. Allowed to clear the code. This morning it happened again but then i also got the p2109 code with it. Any ideas? Im thinking its the pedal assy itself. Link to comment Share on other sites More sharing options...
tdelker Posted September 20, 2013 Share Posted September 20, 2013 Sounds like pedal assy. Hall Effect sensors, so tough to troubleshoot directly. Link to comment Share on other sites More sharing options...
subiestang Posted September 21, 2013 Share Posted September 21, 2013 Sounds like the tb itself Link to comment Share on other sites More sharing options...
DarkSideGT Posted September 21, 2013 Author Share Posted September 21, 2013 I just replaced the accelerator pedal yesterday. Now its just a wait and see if my CEL comes back on. Link to comment Share on other sites More sharing options...
DarkSideGT Posted September 22, 2013 Author Share Posted September 22, 2013 well the cel came back on and took away my throttle again, so i guess it wasnt the pedal assy. I removed the inter cooler and checked the connection at the throttle body. while i was cleaning it, it seems to have some play in the throttle plate shaft, is that normal? Link to comment Share on other sites More sharing options...
subiestang Posted September 22, 2013 Share Posted September 22, 2013 It's probably a problem in the electronics of the tb and nothing mechanical. Link to comment Share on other sites More sharing options...
DarkSideGT Posted September 25, 2013 Author Share Posted September 25, 2013 well the light came back on this morning on my way to work. i pulled over and tried to clear the code. would not clear. i went under the hood and tried to pull the connector at the throttle body off. i was not able to unplug it but i was able to move it and then the code cleared and i was able to get to work. im thinking it is a connection issue. so tonight when i get home im going to remove the intercooler and unplug the connector and put a little bit of dielectric grease on there and see if this fixes my problem. if that doesnt work should i replace the harness? Link to comment Share on other sites More sharing options...
IceCold81 Posted May 8, 2014 Share Posted May 8, 2014 Any updates? I'm barking up a similiar tree as we speak over here myself and it's driving me nuts Link to comment Share on other sites More sharing options...
Max Capacity Posted May 8, 2014 Share Posted May 8, 2014 I would guess it's a bad TPS, but I'd have it checked out before I started throwing money at may be's... Do you have a trusted local repair shop ? Check the local forums for one. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
IceCold81 Posted May 8, 2014 Share Posted May 8, 2014 I would guess it's a bad TPS, but I'd have it checked out before I started throwing money at may be's... Do you have a trusted local repair shop ? Check the local forums for one. I just moved to Arizona from Chicago so I know knowone yet Link to comment Share on other sites More sharing options...
Max Capacity Posted May 8, 2014 Share Posted May 8, 2014 http://legacygt.com/forums/showthread.php/chitown-subaru-meat-223198.html May be ask one of those guys. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
SCASEYS Posted May 8, 2014 Share Posted May 8, 2014 http://www.i-club.com/forums/hawaii-43/p2109-throttle-pedal-postion-sensor-169993/ http://forums.nasioc.com/forums/showthread.php?t=2333055 I donated to LegacyGT.com which allows me to have this nifty signature. If anything SCASEYS posts ever becomes a sticky i'm gonna light this whole place on fire Link to comment Share on other sites More sharing options...
IceCold81 Posted May 8, 2014 Share Posted May 8, 2014 Reading these now, thanks! I can use ANY feedback or input that may be helpful Link to comment Share on other sites More sharing options...
IceCold81 Posted May 8, 2014 Share Posted May 8, 2014 http://legacygt.com/forums/showthread.php/chitown-subaru-meat-223198.html May be ask one of those guys. Yea I'm actually down in Arizona now Max. Thanks for the recommendation though. Link to comment Share on other sites More sharing options...
Max Capacity Posted May 8, 2014 Share Posted May 8, 2014 Yea I'm actually down in Arizona now Max. Thanks for the recommendation though. DUH, I read that but it came out backwards in my mind....tough getting old...LOL 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
IceCold81 Posted May 8, 2014 Share Posted May 8, 2014 Hearrrrrrr that! Link to comment Share on other sites More sharing options...
maddad Posted October 16, 2016 Share Posted October 16, 2016 I'm bumping an old thread because I was having this exact problem with my GF's 06 LGT. I searched, read all the related threads, and found no clear answer to the problem. After checking all the suggested areas, relay, pedal sensor, etc., I figured I was going to have to replace the throttle body or TPS, throttle control part if it was available separately. Because it was Sunday and I wasn't getting the part that day, I went and removed the throttle body. Then used carb/throttle body cleaner and a brush to clean it to a point where I could check it out. I noticed a hole in the lower back of the part and when I sprayed some cleaner in it, I learned it was a vent to the sensor/electric control area under the plastic cap because the cleaner started leaking out around the clipped on plastic cap. The cleaner coming out was filthy and thick with crap, so using low pressure air and the cleaner, I kept filling, shaking and blowing out the unit until the cleaner ran out clean. Because I had nothing else to do, I reassembled everything, and not only got the smoothest idle I've ever felt on the car,but the throttle issue and codes have not come back over the past few hundred miles. Still waiting for the call from her saying it's back, but with every passing day I'm thinking that something under that cover was cleaned and now is working normally. Maybe it's not a completely orthodox repair, but it seems to have worked for this LGT. Just thought I'd share, because if you're taking the TB off anyway, a half hour of effort could chase an annoying gremlin away. Link to comment Share on other sites More sharing options...
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