I'm throwing:

P0251 CP3 Pump fuel Regulator Control
P0191 Fuel Rail Pressure Sensor Performance
P0236 Turbocharger Boost Sensor A Circuit Range/Performance

Truck is running rough, as you would expect. What have yall experienced with these codes? I have read all kinds of things and I am still researching, just thought I'd ask. Thanks for any help.

 

The FCA controls the pressures from the CP3....if it's going haywire it can spike pressures and possibly give the rail pressure code.....will also cause the truck to run very funny....$100 part from a Cummins shop or you can visit www.genosgarage.com

Hope this helps.

 

Thank you sir.I appreciate the help. I'll try that and hopefully it works. Any idea on how hard the FCA is to change?

 

It's just 3 Torx screws. Tap them a bit to try and "loosen" them up as they are installed with Loctite. Maybe a 15-20 min job.

 

Thanks!

 

Not a problem sir. Keep us posted on how it turned out for you.