Hi I am a new be and have a 2002 Dakota 3.7 LV6 extended cab 2 door 4x4
When it runs right it is a great little truck
But it keeps giving me codes and they clear them self’s
And some times it has no power till it hits 2500 rpms then it runes like it should
I get 3 codes PO 152, PO175 and PO442
A mechanic I know said that it could be the TPS
But I checked the resistance and got 4.44 at idol and 1.45 ohms at full throttle
Dose anyone have Amy suggestions of what it could be or how to check it
I don’t want to just change out parts till I find the right one

 

Welcome to the forum Freeflyer.

P0152 - 2/1 O2 sensor shorted to voltage
P0175 - 2/1 fuel system rich
P0442 - evap leak monitor medium leak detected.

Check the engine again. The 3.7 was not available in '02. You have a 3.9 liter. If you see a distributor it confirms it. The 3.7 is coil on plug.

Change the passenger side upstream O2 sensor - before the cat. Do not use Bosch, Dakota's hate them with a passion. Use NTK or Denso.

 

at is a 39 i will change it out next week when i am off and let you know how i do
drove the truck today and it ran great it was one of its good days
thanks

 

The EVAP leak could be a bad fuel cap or rotted fuel filler. It may also be a bad EVAP line. A "smoke" test can help find the leak.

 

ok this is were ther newbe part comes in
how do you do a smoke test?
cant find anything on it on the forum
thanks
it isa great little truck when it is running right

 

A good start is look at your fuel cap for damage then crawl under the truck bed and look at the gas tank filler neck for any rot/holes then check the charcoal evap tank for damage or rotted/broken evap lines.


Thats for the
P0442 - evap leak monitor medium leak detected.

 

You need a smoke machine.

Check the basics first, the cap and lines.