Question about 2001 Dodge Ram 1500 Truck 2WD

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The codes p1596 and 0420 have appeard on my 2002 dodge ram 1500 quad cab and was needing assistance.

My chech engine light came on and i done the method of turning the ignition on-off-on-off-on and the codes p1596 and p0420 showed up and i was wondering what they may mean?

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The P1596 is Speed Control Switch Always High and P0420 is Catalyst Efficiency Below Normal (Bank 1) and try taking the positive cable off battery for ten minutes and see if that doesn't help that way it will reset the computer and may just drop them codes.

Posted on Jun 22, 2010

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