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What is your question?
vehicle has 170,000 plus miles,code p0406 original code set. replaced EGR Valve, now codes p0403, 405 set. trying to help school teacher with this vehicle, any help would be great..
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Possible Causes •EGR solenoid connector is damaged (check pins for damage, and moisture) •EGR solenoid control circuit is open or shorted to ground •EGR solenoid control circuit is shorted to voltage •EGR solenoid has failed •PCM has failed