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Re: 2001 Towncar Codes P0171 & P0441
Posted to Technical Discussion Forum on 9/20/2006 1 Reply

A little odd the engine light DIDNT come on and it set 2 emissions level codes? Unless it was on previously and your wife didnt notice and then it went off again?

Id check fuel trims, and do an audible vacuum leak check for the usual ford PCV system rotted h... Login to read more.

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