04 Saturn L300 no throttle response only goes 10mph and it jerks as it would lose power

So is the reduce power light on?Also do you have the 2.2L or 3.0L engine?If the reduced performance light is not on then I suspect possible a plugged cat. Have you had the computer scanned for codes?

P2110 and P2138 are tied together you would diagnose the P2138 which is accelerator pedal position sensor 1-2 correlation. The P0341 is camshaft position sensor performance. The code P2138 is most likely a bad accelerator pedal position sensor. But you would have to go thru the trouble tree for that code. You would have to use a multimeter to check the circuits from the accelerator pedal sensor to the ecm. That way you would narrow it down to a wire issue or a sensor issue. You would do the same thing with the code P0341. The reason it only goes 10 mph is because the computer put the car in limp mode because there is a failure in the throttle by wire system.

If you had a clogged cat it wouldnt set any of those codes. Also you need to check the wires from the pedal to the ecm the wires from end to end with the multimeter. Also the cam sensor code as well I will get you the info on that.

You have a code for the pedal sensor and when in gear its in limp so sounds like a issue with the pedal sensor or wiring issue.

Lets do this first clear the codes and lets see if ethier the pedal sensor or cam sensor code comes right back?If they dont its going to be hard to check the wires. The tests iam talking about are checking the wire ends from point A to point B and see what the resistance is from the ecm to the sensor.

I think the trouble tree says 5 ohms but I like to see 2 ohms or less.

Your not understanding what iam saying here the wires go from the pedal sensor to the ecm. You would measure each wire end from where it hooks to the pedal sensor then the opposite of the wire where it goes on the ecm. You would have the ecm and the pedal sensor unplugged. Then measure the resistance from each end of the wire from point A to point B. Now do you understand?Same thing with the cam sensor.

What you do is elimanate the wiring as the cause and go from there. Lets see how the codes go and I will get you the trouble trees if needed.

There you go theres a trouble tree and a wire diagram let me know what you find.

So does the P2138 come right back after clearing it?