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  1. K

    Found a strange cause for the P0403, P0443 codes

    I just did the same to my 2010 ford explorer xlt 4.0 and now my engine light is off no codes after replacing the egr valve, purge vent valve, vent solenoid, all four o2 sensors, and cleaning the capless fuel filler neck. original codes p0402, 403 443 455 1141. thanks for this solution the part...
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