Please please HELP! X5 Non-start!

healy787 · #1 07-17-2007, 08:12 PM

Hi all. New to this forum. looking for your urgent expertise! Have an 2002 X5 3.0 turbo diesel which is a non-start. Brings up fault code p09F6 (rail pressure during cranking) Have checked injectors. No.6 slightly suss but not sure if it is enough to cause low rail pressure?? Have checked rail sensor for normal plug corrosion. All clean and intact. Fuel pump sems to be working fine. Have plenty of fuel at filter housing. If anyone has had similar problems, any info would be greatfully recieved. I need to get this sorted ASAP. Thanks very much everyone!

nsaqeb · #2 08-21-2009, 08:06 AM

Hello
Did you find out put p09f6 mean? is it resloved.

I have 03 X5 and getting same message but no clue what to do.

Will appreciate your response.

thanks

nsaqeb · #3 08-21-2009, 09:55 AM

Did you find out the problem?

I have similar problem in my 03 X5.

Isambard · #4 08-22-2009, 11:06 AM

Have you checked the fuel regulator? This pressurises the fuel rail. I'm not sure where it is as I've never owned a diesel (god that hurt to type that word then!!), but on a petrol fuel rail they are usually situated at the end of the rail... Its the only thing I can think of that could relate to low rail pressure.

Weasel · #5 08-22-2009, 12:46 PM

Quote:

Originally Posted by Isambard

Have you checked the fuel regulator? This pressurises the fuel rail. I'm not sure where it is as I've never owned a diesel (god that hurt to type that word then!!), but on a petrol fuel rail they are usually situated at the end of the rail... Its the only thing I can think of that could relate to low rail pressure.

On a diesel there would be a regular fuel pump in the tank that feeds a high pressure fuel pump to get the higher pressures needed for direct injection... I know on the new TT gasoline engines when there is a low pressure fault in the fuel rail it is usually the high presure pump, I would suspect the same for the diesels.