P008700 - Fuel Rail/System Pressure - Too Low

[sgt1297]

Lockdown has prevented me getting hold of the car to check this out.

Will be checking the alternator output as soon as I can and will report back.

Edited 31 March, 2021 by sgt1297

[Hargur]

I think i resolved the issue...

 

just clean the rail sensor with petrol 😂

[magoo88]

Hello,

 

Any updates on this topic please ?

I have this issue on my Skoda Superb 2009 MK2 125 KW 2.0 TDI.

 

Car cannot start giving me P0087 fuel rail system pressure - to low bank 1 

 

Is this Alternator or turbo problem or strictly high pressure fuel pump ? 

 

Tnx in advance.

 

Matija 

[sepulchrave]

It's either the common rail pump or the fuel rail pressure sensor itself.

[sgt1297]

No longer have the car and it was never resolved. 
Car always started and only ever generated the fault when trying to accelerate from too low revs. Didn’t go into limp mode and the light reset when ignition turned off and back on. Not fuel pump or sensor. Local VAG specialist garage diagnosed a sensor, but only because they couldn’t find a fault when diagnosing. A mystery. 
Sorry I can’t be of more help. Good luck. 

[magoo88]

1 minute ago, sgt1297 said:

No longer have the car and it was never resolved. 
Car always started and only ever generated the fault when trying to accelerate from too low revs. Didn’t go into limp mode and the light reset when ignition turned off and back on. Not fuel pump or sensor. Local VAG specialist garage diagnosed a sensor, but only because they couldn’t find a fault when diagnosing. A mystery. 
Sorry I can’t be of more help. Good luck. 

Thank you very much for your quick response sir. I appreciate it much. 

One more question if you don't mind. Have you ever check fuses/releys inside car and in the hood ? 

My issues started when i was driving in S mode after acceleration from 3rd to 5th gear..

 

[magoo88]

1 hour ago, sepulchrave said:

It's either the common rail pump or the fuel rail pressure sensor itself.

I have found metal particles in fuel filter. I am guessing HPFP has gone.

Would cleaning the Pressure valve hold by 2 screws temporally help to start the car since i cannot start it now.

Tnx in advance.

[sepulchrave]

8 minutes ago, magoo88 said:

I have found metal particles in fuel filter. I am guessing HPFP has gone.

Would cleaning the Pressure valve hold by 2 screws temporally help to start the car since i cannot start it now.

Tnx in advance.

 

No, the pump's failed and must be replaced before it'll start again.

[sgt1297]

Metal particles are not great. If it were me I would try anything. There is a real possibility that there will be metal particles in all the bits and pieces. Nothing to loose I would say. 

[sgt1297]

I’ve never checked fuses or relays. The warning light would come on and that was the only indication of a problem. No limp mode and it would reset after cycling the ignition. When dismantling the fuel rail and lines, I never had any metal particles. 
The real issue is the metal particles. As stated by sepulchrave, the pump is the prime suspect for not starting. A fuel pressure test would confirm it

[magoo88]

2 hours ago, sgt1297 said:

I’ve never checked fuses or relays. The warning light would come on and that was the only indication of a problem. No limp mode and it would reset after cycling the ignition. When dismantling the fuel rail and lines, I never had any metal particles. 
The real issue is the metal particles. As stated by sepulchrave, the pump is the prime suspect for not starting. A fuel pressure test would confirm it

Thanks again for your time. I will investigate more with better diagnostic tool and share experience. HPFP is main suspect. 

[BasharAlKhateeb]

Hello there,

 

Did anyone just find out the cause of this fault?

I have a VW Touareg , Automatic transmission and I have exactly the same issue with acceleration