Q: Hello I have a 2006 f150 XLT with a 2v 4.6. It has a cold air intake from k

asked by on

Hello I have a 2006 f150 XLT with a 2v 4.6. It has a cold air intake from k&n high performance coil packs Granatelli and a programmer from Edge. The programmer is mounted on the dashboard. Admittedly this truck used to live in my garage where I would clean the cold air intake and recharge it with oil once every 4 to 6 months. I have not done this in about a year. Approximately six to eight months ago my truck when I would look give me an error code for the throttle position sensor Postion E. thinking about it now this is also when occasionally after driving for a while if I shut the truck off ran into a store or filled up the tank I would go to start it would occasionally give me trouble starting where it wouldn't start right up or it would stall out the first time so I would reset the key to off and then start over and no problem. Last night I got 2 codes 2126 and 2104. No pedal at all. I turned it off and restarted and no issues. No codes. What could be happening

My car has 80000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. I’d be happy to help you. Code P2104 relates the throttle position control actuator, and code P2126 relates to the throttle position sensor. When either of these components is not working properly, this can cause the truck to have intermittent starting issues as you describe.

When the ECU detects that the throttle position control is out of range or not in the position the ECU thinks it should be in, this code will appear. The throttle position sensor is a sensor that monitors the position of this and when it is not functioning correctly, this will cause inaccurate info to be supplied to the computer which will cause an imbalance of air/fuel to be supplied to the motor. This is what causes the intermittent starting and stalling problems.

I would recommend having an expert from YourMechanic come to your home to confirm a diagnosis on the issue and make or suggest the necessary repairs or replacements.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Hello I have a 2006 f150 XLT with a 2v 4.6. It has a cold air intake from k

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Banging under car

Hi. Does it happen during acceleration, deceleration, when turing the wheel, or when just stopped? This information will help determine the source of the noise. This should be looked at soon as possible because it could be a critical component...

Q: Q: Engine cuts off

Unfortunately, with the information given for your Nissan Maxima, it is difficult to give a proper diagnosis at this time. From this description, I see that you in fact have replaced some components related to this issue already. I feel...

Q: Q: im having trouble starting my car

If you feel like the vehicle is flooded, try smelling the tailpipe for gas fumes after trying to start the vehicle. You can also try putting the vehicle in "clear flood mode", or "clear out mode" by holding the gas...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...