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, 20215 yr by sgt1297

I think i resolved the issue...

 

just clean the rail sensor with petrol 😂

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 

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

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. 

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..

 

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.

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.

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. 

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

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. 

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

hi 

i have 2013 Skoda Octavia , 2.0 tdi having same problem 

i have changed

1 Pressure regulator

2- pressure sensor

3- electric fuel pump

4- in tank lift pump

5- fuel filter

still goes in limp mode under heavy acceleration with code p008700

was check by different mechanics and no solution for the problem found yet

if any help will by highly appreciated, because my next step will be selling the car to the wreckers &

never by a diesel car again

 

 

 

 

 

Sounds like injectors issue

hi

how to check injector or i need to remove it and have it checked by specialist ,

thanks
 

Hello

Has anyone managed to resolve this issue?
Ive got a 2014 Skoda Yeti 2.0 Diesel.
Replaced:
Injectors

Fuel Valve

Fuel Filter (Fuel looked a bit sludgy...)

Checked fuel tank pumps

Car starts fine and drives around but goes into limp mode and glow plug lamp flashes.

Can clear codes etc with VCDS but P0087 comes back again.

VCDS suggests fuel pressure issue being pressure islower than expected value.

Any help apreciated.

Edited 3 January3 Jan by joekob

Hello, welcome to the forum.

Have you checked that the fuel pump is delivering fuel at the correct pressure?

Hi

Have not actually checked but will do.

For what it is worth I can tell you that the VCDS data suggests that it is below the expected pressure.

Thanks!

Your comment that the fuel 'looked a bit sludgy' will require fixing too - clean fuel is an absolute critical item, particularly with a diesel.

That could also be the diesel waxing as it’s been very cold recently

10 minutes ago, globalste said:

That could also be the diesel waxing as it’s been very cold recently

Possibly - but will still cause issues.

Hello
Update on progress - still unresolved - here's a write up of steps taken thus far....

Skoda Yeti 2.0 TDI (Engine code CFHC, ECU 03L 906 018 QN)

Symptoms: P0087 – Fuel Rail/System Pressure Too Low. Car drives normally at low load but enters limp mode under sustained load (typically after reaching ~80 km/h). Issue occurs from cold and warm.

Parts Already Replaced (All Genuine or Quality Where Noted):

• Full set of fuel injectors (new genuine Bosch)

• High Pressure Fuel Pump (HPFP genuine bosch)

• Fuel Metering Valve (N290)

• Rail Pressure Regulator Valve (N276)

• Fuel Rail Pressure Sensor

• Fuel filter + lines flushed

• Battery (new)

• Cam follower / timing belt related components checked (good)

• Tank inspected and lift/presuppply pump checked and cleaned (had a very small amount of sudge - perhaps even silicon? - in it).

Diagnostic Tests Completed:

• Injector return flow test: Normal (equal across cylinders)

• Static lift pump flow test: 2.4 L/min (good)

• Filler cap vent test: No improvement

• Multiple VCDS logs: Consistent rail pressure lag under load (150–350+ bar deficit)

• Cylinder 3 deviation improved after new injectors but rail pressure issue remains

Current State of Play The high-pressure side (injectors, HPFP, sensors, N276, N290) has been completely renewed and tested. Static low-pressure volume is good, but the system still cannot maintain rail pressure under sustained load.

Next steps - the tank pump is moving enough fuel (2.4L per min), but MAY not be performing under pressure/load. I havebeen advised to to do a manual pressure test on the fuel line between the filter and HPFP, and take it for a drive and trigger the P0087 error. It appears that a manual check is required as the ECU version and VCDS does not have a presupply pressure sensor, or if it does it not accessible via VCDS measuring values. The crappy thing with the manual test is that I need to rig a gauge from the engine bay to somehow read it from the drivers seat whilst travelling at 60kmh. Crazy.

Happy to hear any other suggestions before undertaking the manual test!