emt1581
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Posts posted by emt1581
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The p2138 code seems to get more and more aggressive / frequent over time.
Mine got to the point of about 1 per every drive cycle, before I stopped letting my wife drive the car. Too unreliable, too dangerous.
I started up my 1987 Mercedes 300D (fresh battery and one crank of the key fired right up)... after sitting for a couple years. Most reliable car on the planet... she drove that while I diddled with the code.
I think I solved p2138 finally by cleaning the sensor traces in the pedal... very careful operation, detailed in another thread.
http://legacygt.com/forums/showthread.php/bad-throttle-position-sensoriii-158048p3.html
My car is like yours, a 2006, and I've got 200,000km on it. That's a lot of back and forth wear on the pedal sensor. But it was possible to clean it up.
Been driving now for 3 x days not once thrown the code. So definitely an improvement!
I'll give it a look over the weekend. Thanks for sharing!
Still curious why Subaru would do such a dangerous thing like allow the sensor to trip the system and stop the car while driving in traffic!! That is law-suit territory!
-Emt1581
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Wanted to check back in....sensor caused a check engine light again today. Basically killed the car when it happened. My wife was going around 5mph in traffic (coasting) and all of a sudden the check engine light came on, car wouldn't accelerate and she barely made it into a nearby parking lot.
Came home from work, hooked up the OBDII and got the throttle position sensor code again. Took out the pedal, blew in the male and female end, put it back together, cleared the code and drove it around for 30min. It's fine.
How is such a minor issue able to cause such a systemic/catastrophic failure?!?! I could understand the light. I can understand an alarm or something...but why program the car to completely shut down if a position sensor trips???
Thanks
-Emt1581
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Been a few months....still fine.
The airbag light comes and goes which just means I need to work on or replace the overhead light board.
Other than that, no issues.
-Emt1581
Been 6 more months...still fine!
-Emt1581
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give it a few weeks
Been a few months....still fine.
The airbag light comes and goes which just means I need to work on or replace the overhead light board.
Other than that, no issues.
-Emt1581
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Update...problem solved!
Visited the local Subaru dealer and asked about diagrams/part numbers/ cost of replacement/etc. After talking to a mechanic the guy said he was told I could try to clean the terminals/sensors but usually once the check engine light came on it was time to replace. I was also told about the two 12mm bolts holding the gas pedal in place and the plug connecting everything. Finally, if a replacement was needed it would have been $180 out the door.
Came home, unbolted the gas pedal and disconnected the plug. Blew into it...boy was that full of dust!!, then I reconnected everything and started the car....no more check engine light!! Hasn't come back since!
Seems like it worked. And if it comes back, I can clean it again or just replace it but I'd find the part online rather than paying $180.
Just figured I'd share.
Thanks!
-Emt1581
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The 06 Legacy I just bought my wife last Tues night had this code come up. Are there any vids online showing step by step how to dismantle/clean everything?
Thanks
-Emt1581
P2138 - Throttle/Pedal Position Sensor/Switch
in Turbo Powertrains (2.0GT, 2.5GT, 2.5XT)
Posted
In other words, this is the result of crappy engineering that Subaru intentionally did and won't (or maybe didn't....to give them the benefit of the doubt that future models are improved) spend money eliminating?
Is there any permanent fix for this short of blowing on the sensor every few months?
Thanks
-Emt1581