I can't get my truck to go, all it will do is idle?

Tiny
RUSSELLNOLEN
  • MEMBER
  • 2018 FORD F-150
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
I can't get my truck to go, all it will do is idle and shows a bunch of different codes. I can mash the pedal but no response.
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Sunday, April 25th, 2021 AT 3:58 AM

7 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
If you are accelerating and the RPMs are not going up then it sounds like you either have a throttle position sensor issue or possible communication network corruption.

Can you tell us what specific codes you have? If the list is long, can you just take some pictures of the scan tool screen and that will be easier then typing them all out?

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is a guide that will help with network issues which is what I suspect we have:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let us know and we can go from there. Thanks
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Monday, April 26th, 2021 AT 8:42 AM
Tiny
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Po606, Uo422, P2681, P2602, P2122, Po60B, Po600, Uo422, Po606, Uo422 and P2681. That' s all of the codes I got them from my tuner.I looked at the list of codes from the website and couldn't find any of them. Maybe you can help. Thanks for your time and help.
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Monday, April 26th, 2021 AT 11:48 AM
Tiny
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You said you have a tuner on the vehicle?

If so, that is going to be the cause of the P0606, P0600, P060B.

The U0422 is just saying that there is communication issues which would be the case since it appears the PCM cannot communicate or is damaged.

Also, the P2122 is for the accelerator pedal position sensor as I suspected.

So let's start with what aftermarket components you have installed on this. Can you remove them and retest the operation of the vehicle?

Please see the info below.
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Monday, April 26th, 2021 AT 8:22 PM
Tiny
RUSSELLNOLEN
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  • 5 POSTS
Thanks for your help and I have a cold sir intake and a timer on my truck that all the mods I have done.
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Monday, April 26th, 2021 AT 9:57 PM
Tiny
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Okay. The cold air intake is clearly fine. What exactly do you mean by a timer? Is this something that plugs into the DLC? Can you get a picture of it so I can better understand?

However, if this all checks out then I suspect the PCM is the issue.
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Tuesday, April 27th, 2021 AT 7:12 PM
Tiny
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Sorry for the typo, I meant to say that I had a tuner on my truck. But I am sending it to the shop today and hopefully I can get the problem fixed. Thanks for your help.
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Wednesday, April 28th, 2021 AT 5:28 AM
Tiny
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Got it. If you happen to not have it at the shop yet, try taking the tuner off and see if it still does it. I have seen when these fail and cause all sorts of issues.

If not, please let us know what this turns out to be. Thanks
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Wednesday, April 28th, 2021 AT 6:11 PM

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