clk209nic

Pulling of the freeway last night and coming up to a junction, i went to accelerate and felt the car was spitting had no throttle. So i pulled over, pluged the diagnostic machine and fault P3699 Fuel Rail sensor has a mulfunction popped up but no cel light. I had the reserve fuel light on but still had 45 miles range so i wasnt suspecting it was low on fuel

Cleared the fault drives fine with no power loss, but really want to solve the issue now before it happens again

Am i right to the to replace the fule pressure sensor on the fuel rail P/N A 156 153 00 28?

Solo wing

P3699 Is the manufacturer code for P0191.
search for P0191 in this forum and you'll find answers.
Memebrs reported replacing:
1- PCV & intake gaskets
2- fuel filter
3- fuel pump
4- fuel pump modules
5- fuel injectors
6- fuel rail sensor

Any of these could be the cause of the issue.

Good luck.

clk209nic

Thanks for the info Sol_wing

Replaced the following
pcv & intake gaskets
throttle bodty gaskets
refurbed all injectors

Is there a way i can test fuel pumps / fuel pressure sensor?

Intor_thexx

in my case I replaced the fuel rail pressure sensor the fuel injectors the fuel filter and it didn't take care of the issue until i replaced the right fuel pump
before I replace the right fuel pump the check engine would come on after 5 minutes of driving but now I did 45 minutes of driving and the check engine never came back problem solved in my case

eightysixtuned

if you crack the fuel line from the rail and fuel doesn't spill out, you have a fuel pump or fuel controller failure.