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I've got a '03 LE RWD and for a while now it's been having a problem that's been causing the car to severely lacking power (accelerating at less than 1/4 of normal speed even with pedal to the floor) and to also "grab" or "jerk" when decelerating as if it is having trouble downshifting, it is a hard symptom to describe but it isn't a prolonged or aggressive "jerk" but it will happen at any speed so long as you are not on the gas pedal, all of these problems occurred at the same time which is why I believe they both have the same cause. I went ahead and scanned it to see if that would give me an answer as it does not seem particularly like mechanical failure, however the only code I could pull (which isn't really a helpful one) was a "U1001(Invalid or Missing Data for Primary ID)" Which I'm guessing means that for some reason the car can't communicate with the OBDII scanner or that there is a miscommunication/misconnection within the CANBUS itself. I am completely stumped here as I have yet to come across (online or IRL) across another Pathy with the same problem (probably also because it is such a rare symptom to describe without driving the car for yourself. I'll also mention that a friend of kine suggested that it could be a torque converter issue which I doubt simply because i've never been in a car with a malfunctioning torque converter that behaved that way, and because a torque converter shouldn't cause that drastic of a power loss but hey I could be wrong, another note is that the car has been babied it's entire life(150k mi) and maintained relatively well. If anyone could help me out and point me in the right direction and any advice it would be greatly appreciated.