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The Dodge Dakota (called the Ram Dakota for its final two years of production) is a mid-size pickup truck from Chrysler’s Ram division (formerly called the Dodge Truck division). The second-generation Dakota began development in 1991, though they were not introduced until 1996 for the 1997 model year.

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Why does my truck show code for p0505 p0122 p0171

Truck acts like its not getting full power it runs but after a while of running and it sits for 10 minutes it won't start back up unless you let it sit for a while. Kinda acts like its flooding. Also the fuel gauge will work then won't then when you fill it up it works but after a little bit goes back to empty then sometimes back to working. I have replaced the TPS and Idle air control sensor. What am I missing here? Any help much appreciated. BTW it's a 2000 dodge Dakota quad cab 4.7 magnum V8

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Let me see if I can help,

  1. PO505 - Is a circuit problem which was likely caused by the Idle Air Controller. After replacement has this code resolved?
  2. P0122 - indicates a low voltage in the throttle position sensor circuit. After replacement has this code resolved itself?
  3. P0171: This code indicates that the fuel system on the first bank of the engine is weak or that there is a vacuum leak near this side of the engine.

I will address the po171 which i would say is the telling code. It fits the description of your issue as well. The leak is causing the computer to read that the truck is running lean and thus it is attempting to send more gas which in turn acts like the vehicle is flooding.

You need to first check for vacuum and intake leaks. With the engine idling, spray each vacuum hose one by one with some carb cleaner. If idle changes when one is sprayed, then you need to replace that hose. If all ok, then repeat by spraying the base of the intake manifold with carb cleaner. If idle changes, then replace the intake manifold gasket

If ok, the fuel pressure needs to be checked. Fuel pressure at idle should be 44.2-54.2 psi (305-373 kPa). If lower than that, then replace fuel pump. If higher than that, then replace the fuel pressure regulator.

Report back and we will take it from there.

I hope this helps.

Cheers

Monte

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Randy Richter さん、ありがとうございました!
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