APPS prob's after truck sits for a few days.

Got Smoke?

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Oct 8, 2006
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Ok I was driving my 99 everyday up until 3 wks ago when I got my Jetta. Now the truck sits all week and gets drove usually once on Saturday or Sunday.

After the first week of sitting I attempted to take it for a run into town for stuff to do general maintenance. I noticed a jumpy idle while I loaded some gallons of waste oil into the truck for my trip to auto zone. Well I didn't make it much further out of the drive way before I got a check engine light and a very unresponsive throttle.

I made it to my next neightbors driveway and turned around to come back to the house. I got my cheapo OBD II scan tool and read the code "PO 0123" voltage to high. I cleared it and the truck ran fine, and I made my trip into town and actually ran around town for an hour and then back home without another problem at all.

Then the truck sat from a week ago Sunday to this past Saturday. I let my parents take it to go pickup a christmas tree, and it did not give them any problem what so ever. They were gone for several hours as well with my mother driving...she's not a lead foot or used to a big truck so I know it was babied.

Fast fowards to tonight...I come home and considering its been in the teens since Sunday I decided to start the truck tonight and let it run for a little while. IMMEDIATELY got a check engine light. Attempted to clear it with my cheapo scanner and as soon as I clear it every time it comes right back.

Is my TPS junk? Or could it possibly need adjusting because I have probed the voltage wire and adjusted the voltage to match the tag on the TPS in the past
 
Last edited:
If the voltage matches the tag then there's no more adjusting to it.
 
If the voltage matches the tag then there's no more adjusting to it.

Sorry I didn't word that correctly. I edited my post.

I have checked and adjusted the voltage in the past while trying to track down a irritating lack of downshifting until down to 1300-1400 RPM.
 
Mine done it 2x in the last week, seems to be something with the cold.
 
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