Hi all 

 

I have an Octavia 1.6fsi 2006. It has been a great car with minimal issues until this year. 
 

The exhaust warning and EPC both came on a few months ago. With a cheap ODB reader, it pointed towards fuel pressure regulator 08853 error.
The car was running, but would run lumpy at times and fuel efficiency was down. I could smell excess fuel sometimes from the exhaust. 
 

I bought a used HPFP and cam follower. The original cam follower was not worn through but I replaced it and put in the used HPFP.

 

The car ran better and fuel efficiency had improved. However the exhaust and EPC lights were still on with N276 error still occurring. 
 

Car was fine for a few months but on the motorway last week, the car lost all power, accelerator did nothing, so I carefully pulled over. Car was spluttering. I turned it off, waited a few minutes then turned it back on and everything seemed ok and I continued on slowly to get home. 
 

I have now had the car scanned with VCDS. 
6 faults were found, pictures below.
The main one being 

000853 - Fuel Pressure regulator valve (n276), p2295 - 002- short to ground - MIL ON 

 

All faults were cleared then the Car restarted,  the n276 short to ground fault came back. 
The engineer checked the wiring and found f23 15A fuse blown. This was replaced.

Cleared faults, restarted car.
N276 fuel pressure regulator reappeared but now says Short to Plus. (Picture below)
 

Engineer thinks the used HPFP also has a faulty fuel pressure regulator, as it has to be the most likely reason for the fault to still appear. We checked my original HPFP by plugging it in and the same error appeared. 

I suppose it is bad luck that the used HFPF has the same problem. I may have to just buy a new fuel pump which is around £300 but if it doesn’t solve the problem, then the new fuel pump was not needed. 

 

Has anyone got any other advice or anything else to check?

Is there a way to test the Fuel pressure regulator with a multimeter somehow? 

Did you solve this problem somehow?

On 31/03/2025 at 17:10, Temppu85 said:

Did you solve this problem somehow?

Hi

I haven’t managed to solve the problem.

I am hoping someone else on the forum might have some ideas.

Recently I personally checked the power to the fuel plug. When car is on it gets 14v on one pin and 1.7 on the other pin. This should mean the wiring is ok.

The resistance of the fuel pump solanoid is 1.8ohms (measure across the pin) . Apparently this is within tolerance .

My Research still suggests the replacement used fuel pump I bought is faulty.

So it looks like I need to get a new replacement pump.

I can only find cheap import fuel pumps for £70 to £90 (unbranded I think)

Anyone suggest what else’s could be wrong or which fuel pump to buy?