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Pretty sure that was the code I threw when the TB crapped out, and yes it was only the sensors and no, they cannot be replaced. They are under the heat sink on the TB and as you will see, they are riveted on. A rebuilt TB should be about $150 at the dealer, maybe a bit more. Replacement takes 20 minutes total for off and on - nothing to it if you have allen wrench to remove. No new gasket needed either.
I'm thinking water has nothing to do with it. And I too have an '03 - believe it had about 98k on the clock when the TB failed. I had been having a high idle situation prior to it failing, for probably 6 months or maybe more. All cleared up with the new TB.
Oh yeah - welcome to Tech.
It is always nice when folks post problems and we offer some ideas that the OP gets back on and lets us know the outcome - just saying...
If after doing the reset procedures, the high idle continues, my feeling is to replace the TB - for $150 and 20 minutes of labor it is relatively cheap, and my car has had no issues at all since I did that. idle is smooth as silk at 750 RPM, gas mileage is better than it used to be (of course at $3.40 a gallon or more lately, I baby the pedal a bit more than before, lol) Again, i don't remember the exact code I had, but it did indicate throttle position sensor, which IS riveted onto the TB - under the black heat sink portion. Do NOT pay the dealership to install, but check with them on a reman TB as it will be an OEM replacement. Even if you are not all that mechanically inclined, let me know - I'll write up a step by step.
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