how do i trouble shoot the check engine light on and engine noise?

2007 CHRYSLER ASPEN
152,000 MILES
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LORMARK92
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car has oil. we hooked up a gauge to the sending unit. It initially had 40 psi then dropped.
Dec 27, 2011 at 1:29 AM
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SATURNTECH9
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The pressure will as the oil gets hotter and thinner.What did the oil pressure drop to at idle?
Dec 27, 2011 at 1:32 AM
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LORMARK92
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dropped to 10 lbs after 3-4 minutes with cold engine. Oil light comes on sporadically.
Dec 27, 2011 at 1:43 AM
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SATURNTECH9
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What size engine do you have?That oil pressure sounds about right.
Dec 27, 2011 at 4:24 AM
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