Mazda Protege This compact model offers an economical solution for the need for a sporty sedan or wagon.

Code P1504

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Old 05-24-2019, 11:59 AM
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Join Date: May 2019
Location: Henderson Texas
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Default Code P1504

First off hello everyone. First post here so hopefully Iím not overlooking the answer to this on here somewhere already. I have a 99 protege with a 1.6l with an auto transmission. CEL stays on and get P1504. Changed the AIC with no change. Car has slight surge at idle and running very rich. I know the possibilities could be an open or shorted AIC circuit, one of the evap solenoids or possibly a plugged cat. Any ideas on where to start checking and how to test these components without throwing parts at this thing.
 
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