Hey all,

have an 01 ram 2500 and just had the lift pump replaced. I had the pupm at the filter and they changed it to a tank mounted unit. Said it was much better. Anyway, drove it about 10 miles and ran fine, shut it off overnight and now it wont go over 25mph with pedal all the way to floor. Only tachs at 1800. i'm getting an error code of P0640 and P1693. I dont know what the codes mean..

 

P1693 is a companion code that says there is another code. Look here for the P0640......has to do with the intake air sensor.

Look here for the location.

Welcome to DTR.