Any ideas on this - Fault Code P0123

[Hound]

On the way home from an Honor Flight send off, about 7:30 am and about 36°F, winding out and cruising about 90, when the check engine light comes on. Didn't note any changes so I just slowed down for the last 2 miles home. While waiting for the garage door to open in neutral, I 'blipped' the throttle and nothing. Then put it into 1st and the throttle worked fine and one inside, checked the code that came up:

P0123 Throttle Pos Sensor/Switch A Circ Hi Input

I do have a pedal box on it and never had a problem.
I replaced the battery a week ago and that's working fine, shows 14.5 volts on the gauge.

Any ideas?

16 RTL - other than deactivating DSS, it's never been updated since I got it in '21 w/1200 miles on it.

 

[CloverHillCrawler]

Have you tried disconnecting the pedal box and see if it duplicates the same code?

Also while disconnected inspect the connectors for corrosion then give it a very light coating of some dielectric grease before you reconnect it.

 

[Hound]

I will try that later when time permits. Thanks

 

[Hound]

It's been about 2 hours now so I went out and it started fine and no check engine light on. Didn't check for codes but will later.

 

[Mikey]

It could be that you're giving the Nanny a headache with your Pedal Box, it's working faster than she can keep up! Good luck! Some times when you reinvent the wheel, you have a flat spot from time to time!

 

[LongIsland]

Googled it and found the P0123 code indicates a possible faulty throttle position sensor.

 

[Hound]

I have about 75 miles on since the code cleared and all works well.