MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Sheeny94 on September 11, 2016, 03:14:04 pm

Title: Fault P1020 after timing chain change
Post by: Sheeny94 on September 11, 2016, 03:14:04 pm

Hi,
Just changed the timing chain and tensioner on my mk5 GTI all seemed OK
However now I'm getting a very tappy sound from the engine and a fault code of P1020-Fuel Pressure Regulation: Control range exceeded
From what I read this fault is generally either the fuel pressure sensor or the fuel pressure control valve
Any way I can narrow this down or any ideas what could have gone wrong?
Thanks in advance


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Title: Re: Fault P1020 after timing chain change
Post by: f00glee on September 12, 2016, 04:08:13 pm

BUMP.

Dont know the answer but always keen to learn. Plus I'm having my chain/tensioner done on thursday so would be nice to know; just in case mine suffers the same symptoms!

 :drinking:

Title: Re: Fault P1020 after timing chain change
Post by: Paradox1 on September 12, 2016, 04:20:58 pm

Quote from: f00glee on September 12, 2016, 04:08:13 pm

BUMP.

Dont know the answer but always keen to learn. Plus I'm having my chain/tensioner done on thursday so would be nice to know; just in case mine suffers the same symptoms!

 :drinking:

Im booked in for the same on thursday too. hopefully it will be problem free....

Title: Re: Fault P1020 after timing chain change
Post by: vgergo on April 07, 2017, 10:06:40 am

Hi!
I have the exactily same problem. Could you tell me what was the solution?

Quote from: Sheeny94 on September 11, 2016, 03:14:04 pm

Hi,
Just changed the timing chain and tensioner on my mk5 GTI all seemed OK
However now I'm getting a very tappy sound from the engine and a fault code of P1020-Fuel Pressure Regulation: Control range exceeded
From what I read this fault is generally either the fuel pressure sensor or the fuel pressure control valve
Any way I can narrow this down or any ideas what could have gone wrong?
Thanks in advance


Sent from my iPhone using Tapatalk

Title: Re: Fault P1020 after timing chain change
Post by: pudding on April 07, 2017, 03:13:38 pm

If it's making that kind of noise plus fuel pressure fault codes, it's probably related to the HPFP.   This area is disturbed when changing a chain, so go over your steps and ensure nothing was missed or broken accidentally.

Title: Re: Fault P1020 after timing chain change
Post by: Pesky jones on April 07, 2017, 03:43:08 pm

Get access to VCDS (VCDS register on this forum) and check block 90 for the actual and specified adjustment. The actual adjustment should be within + or - 1 kw of the specified adjustment. So if the specified adjustment is 24kw you want to see 23-25kw in the actual adjustment. If all is in order as described as above then the problem isnt in the cam chain change... something seperate.

As said, the hpfp is removed from its cover, and then the cover itself is removed during the chain change so it is possible that something in the process has caused the issue. I think that one of the electrical sensors on the hpfp itself is damaged/failed. Check them