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I have a 2004 f-150 that my son was just about to give away for next to nothing because it would not idle. There is a code p2106 - throttle actuator control system malfunction, forced limited power. Instead of him taking the truck (new family low funds) to be seen about he would just drive it with two feet! When i brought the truck home i noticed that between 55 & 70 mph the truck would shake real bad and i thought the oversized tire were just out of balanced. I read some of the other threads about the throttle actuator and didn't see anything about the vehicles not idling. Could someone please help me out in this area. Thanks in advance!
The throttle body actuator is the motor that moves the throttle body blade and is usually integrated into the throttle body itself and not serviceable. If that is the cause of the code, the whole throttle body would have to be replaced.
I had an issue I was tracking down and eventually my truck would not idle for about 2 days if you let your foot off the gas. I searched these boards to get an idea after I pulled the P2106 code and didn't find anyone having a problem with holding idle either, just dying, which I already had. I was able to replace just the throttle position sensor, though you may have to replace the whole throttlebody if that's your problem. The new TPS took care of the issue for me, do some diagnostic work first if you can before shelling out the cash for anything though.
EDIT: ctsv510 was mentioning the actuator itself, this code is related to the entire throttlebody control system. This could include the TPS, the actuator motor itself, the wiring, etc. It's unlikely that the actuator itself is bad, more likely it's the TPS. Check the wiring to all of that first and see if anything is frayed or damaged as a start.
1997 Scab XLT 4x4 : 180,000 Miles.
2004 Screw FX4 "The Legend" : 340,000 Miles and still going strong.
THANKS TO ALL FOR THE INFORMATION! CAN ANYONE ADVISE WHAT THE BEST REPAIR MANUAL AVAILABLE FOR THE 2004 F-150 4DR IS? THANKS AGAIN TO EVERYONE FOR MAKE THIS EXPERIENCE PAINLESS! THIS IS THE FIRST TIME I EVER TRIED ONE OF THESE FORUMS AND I HAVE ENJOYED JUST READING ALL THE INFORMATION ON ALL THE DIFFERENT PROBLEMS FORD OWNERS EXPERIENCE.