engine light on.when i start engine i get 5 beeps on truck and every half hour 5 more steady.when reading code it says p1401-diff pres feedback egr circuit high input.can i repair myself easily or take it to a shop.rate per hour is 120.00 and 100.for them to put on computer to tell me its code p1401.

 

It's a good possibility that the sensor is defective. If you have enough savy to get codes , I believe you can change that sensor.