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  1. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    I figured out how to get in car diagnostic to work mine was on/off and heat up button at the same time. there were a lot of history codes but only two active. The first was po400 (Evap control system Malfunction) the link said: 1. check or replace the gas cap and reset the code and drive and see...
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