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TPS issues are pretty common. is the car acting up at all or just throwing a code? i had to have the TPS and related wiring replaced in mine to fix the problem, but i never threw a code. the car's idle just had a mind of its own.
for mine, the RPMS had a mind of their own. i would take the car out of gear and it would bounce form about 3500 rpm back down. sometimes holding a high rev (w/o using the accelerator). first couple trips to the dealer didnt fix it, but finally they got smart and replaced the problem