Question about 2001 Dodge Durango

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Oil pressure gauge goes down when i make a stop and goes back up when i take off. after a while the emission light appears on console

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Check the oil sending unit.

Is it a leaker?

Also check the wire from the oil sending unit.

It can be ground to the frame or motor.

Use nylon tie to make sure it's secure and the wire insulation is in good shape.


You can get an OBDII code reader and get the code easily,

Get the PXXXX code(s) and post it on the comment window.

I will follow up later.

Posted on Dec 11, 2009

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Both issues could be normal to a degree. The engine temp would go up some when the truck stops moving, and the oil pressure would go down some when the engine returns to idle.
Are the two gauges reading out of normal range ?

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A bad oil pump would be your worst case, but, My oil pressure gauge drops right down to nothing at idle and goes right back up when I take off. It's like a tachometer. Has been like that for 10 years. Might just be a sensitive sending unit. My old truck had a gauge that would measure 65 lbs pressure with one qt of oil in it! So, the pressure in not necessarily the level. I don't know what to say about the light. Hope this helps.

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When i come into a complete stop the oil gauge goes down.

If it's your oil pressure gauge, that is usually normal. The pressure will rise and fall with the RPM's of the engine, since the oil pump runs off of the engine itself.

Do you have a CEL coming on when it does that? If so, got to Autozone or Advanced, and get the codes from it, and myself or someone on here can help you fix it.

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