Got a check engine lite over the weekend.Was towing the trailer.Felt like it was down on power then clear up,comes and goes.Scanned it and has a 1690 code.Any ideas what will set this?Will the lift pump going out set this?Have to check the fuel pressure yet.Will a speed sensor cause this code.The truck has had a problem with the cruize staying set sense i got it couple months ago.Dont know if this is related to the code setting.Cruize Will set then loose it,reset and will work then loose it again.Didn't see a speed sensor code.Just looking for some imput from you guys.Trucks a 01 H.O.6spd.Had a 91,have to learn this one.Thanks........Tim

 

Well, here's the code definition.
P1690 Fuel injection pump CKP Sensor Does Not Agree With ECM CKP Sensor

Crank/cam position sensor going bad?


phox

 

Last night my truck started throwing p1690 code loss of power everything else works just fine any suggestions I'm lost good fuel pressure

 

Replace the cam position sensor. Geno's or Cummins have them. It is kind of a pain to get at, behind the VP44. I don't believe the 2001 has a crank position sensor. I had one go out on my 2002. Eventually started throwing 0216 code. Luckily at that time was covered by warranty.

 

I tried that and still same thing loss of power check engine light on with same code I did notice a slight smoke coming out at idle I'm thinking pump problem