Having problems with your Ford F-150 ?

2004 ford f150 5.4l check engine light and fail safe on interior display. code read p2104 and p2111 so I replaced the throttle position sensor, no fix. starts but no throttle and rough idle. is it the ECM and can it be replaced shade tree or must take to dealer,

Posted / edited by AnonymousUser on : 21-06-2021

Answers :

Hello, I will try to get this shadetree enough so we both can understand it. I found articles for this defect going past 2 years, so I imagine nothing new has been invented to fix it.
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\012The Code 2104 is only showing that a secondary part was trying to adjust the idle because the primary part was not doing the job. They call it an Accelerator Paddle Positon sensor, an APP for short. I can't say if it is the same as a TPS.
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\012The Primary part that needs fixing is the Throttle plate (body). Thats your Code 2111 and it means the throttle plates are sticking in the bore, your TAC motor is crosswired, or the Harness connector for the TAC is shorted together. The TAC is the electric valve combination built into the Intake and it looks like a miniature starter, round and elongnated. It deals with venting airflow.
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\012The TAC, wiring harness connectors, and throttle plates are all something a shadetree can clean or inspect. Make sure the TPS you installed was properly in the slot at the Butterfly shaft. Check the small screws or rivets in each Butterfly flap as a loose Butterfly valve can jam in the bore.
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\012Basically everything is saying the throttle is not closing to where it belongs according to the other sensors and that it is not synchronized with other moving parts. It is always open too much. I am thinking the engine is getting too much air.
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\012Now after checking those items, if nothing is shorted,loose or binding they say you need to have the PCM tested or reprogrammed. I am thinking it might be worthwhile to buy a PCM Relay and stick it in. You can do it first or last, but as a last ditch effort to avoid a Dealer I would try it.
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\012I would like to know what finally fixed your truck as I see some Solutions but no verifications.
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