car has been playing up on starting,and now it keeps stalling on me,plugged in and got message......po191 mod 11.....fuel rail pressure.....sensor A circuit,thanks in advance

 

Hi Dodger,
Everything below is from my manual with respect to that code. May give you somewhere to start.

Hope it helps

Fuel filter/system restriction
Fuel system leak
Incorrect fuel pump output
IP sensor to ECM sensing
circuit; high resistance, open
circuit, short circuit to ground,
short circuit to high voltage
IP sensor to splice in sensor
supply circuit; high resistance,
open circuit
IP sensor to splice in sensor
ground circuit; high
resistance, open circuit, short
circuit to ground, short circuit
to high voltage
IP sensor failure

 

thanks for that,but what does it all mean and how can i pin one of them down?

 

If you have checked the fuel filter and fuel pressure at the rail, then check the fuel rail sensor. Try the easy stuff first, cleaning connections and making sure it is connected correctly.

 

just wish i knew what you were talking about

 

Was hoping to help but your set-up is very different than mine. Jac

 

The MY 2002 XKs do NOT have a Fuel Pressure Sensor (a electrical device that connects to the ECM).

They do have a Mechanical Fuel Pressure Regulator.

There is no signal from this device that would set a trouble code.

If the car is a 4.2 Liter, then it would be a MY 2003 with a Electronic Sensor.

Are some 2003 Cars in the UK registered as 2002s?

Edit: Sorry, I just see that it's a 4.2 Liter. It must be (what we in the U.S.) call a 2003 MY. It would indeed have a Electrical Sensor.

 

Yes, the 4.2L appeared in the UK in 2002, so this system is electronic returnless fuel pressure regulation with no schrader valve. Fuel pressure can be read from an OBDII scanner with real time data monitoring features.

 

when i plug in my scanner and it comes up with diagnostics where do i go from there?

 

Not all scanners can read real time data, some only read codes. What is the brand and model number of yours?

 

its an actron

 

cleaned up the 2 sensors in the fuel line and sprayed them,started the car and took it for a small run and it sems fine so have my fingers x.........thanks all

 

Really hope that has done the trick for you Dodger.

 

error on my part please excuse.