2004 Jaguar Other

Engine Performance problem
2004 Other Jaguar Models 6 cyl All Wheel Drive Automatic 68000 miles

my car goes into limp mode periodicaly. The first couple times it has happened, I turned it off and started it back up and it was ok for a couple months. Now it happened again and I bought a pocket scanner and it brought up 2 codes. P0121 and P1111. I looked at p0121 and if said its a throttle/pedal position sensor a circuit range performance. What does this mean? What is the other code. Is this problem a small fix or is it major.
November 10, 2008.

Replace the throttle/pedal position sensor

Dave H
Feb 8, 2010.