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Thread: Golf 2007 1.6 FSI help with P2296 Fault code N276 Fault

  1. #1
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    Golf 2007 1.6 FSI help with P2296 Fault code N276 Fault

    2007 Golf 1.6 FSI BLF Engine
    P2296 fault code



    Hi

    Got a 2007 Golf 1.6 FSI with BLF engine in my bodyshop

    Car belongs to a friend of mine and has run poorly for a while finally got him to bring it over to sort it out
    The other issues have been solved like service items missed & the Motion flaps were stuck shut as the vacuum valve to operate them had packed up and other silly bits

    So it runs smoothly now just cant get rid of the last fault

    Stuck on the last fault code. P2296 listed below


    Fuel filter was many years old and the fuel coming out of it dirty so I changed that and flushed it through this had killed off the Hi-Pressure fuel pump so we changed that as well
    straight away the car ran better, it was missing and cutting out ... but fault code remains

    New parts fitted
    Bosch Battery
    NGK Spark Plugs
    Mann Fuel filter
    VW Genuine N276 Hi Pressure fuel pump and cam follower. (Old follower was worn but not holed or overly thin)
    VW Genuine N276 Power supply relay on Engine bay fuse board. This gets slightly warm I think there's something going on there but cant find it



    There seems to be nothing else on the circuit for the N276
    I downloaded engine wiring diagrams from VW

    Following Wiring tests OK from ECU to N276 which on this car is the Hi pressure pump as well (Earth track)
    Fitted jumper wire to Fuse position positive track and it does the same thing...
    Wiring has no continuity to Earth or Live when isolated at N276, unplugged from ECU and fuse removed

    But car is convinced it has short to plus...

    Im stripping the loom next to look for issues but its a real head scratcher

    Any one had similar issues any help welcomed






    18728/P2296/008854 - Fuel Pressure Regulator Valve (N276): Short to Plus

    Possible Symptoms

    • Malfunction Indicator Light (MIL) ON

    Possible Causes

    • Wiring and/or connections faulty
    • Fuel Pressure Regulator Valve (N276) defective

    Possible Solutions

    • Check wiring and connections
    • Check / Replace N276

    Special Notes

    • On some engines, the N276 may be refered to as the N290 in the factory wiring diagram.

  2. #2
    Administrator Keithuk's Avatar
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    VAG Error Code: 18728/008854
    EOBD II Error Code: P2296

    Fault Location:
    Fuel Pressure Regulator Valve (N276) - Circuit High/Short Circuit to Positive

    Possible Cause:
    Malfunction Indicator Lamp (MIL)(K83) active.

    Wiring/Connector(s) short to positive.
    Fuel Pressure Regulator Valve (N276) defective.

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s).
    Read Measuring Value Blocks (MVB).
    Check/Replace Fuel Pressure Regulator Valve (N276).

    Special Notes:
    On some engines, the Fuel Pressure Regulator Valve (N276) may be referred to as the Fuel Metering Valve (N290) in the factory wiring diagram.

    As taken from my new EOBD II Fault Codes Software
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


  3. #3
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    Working on the car again today

    Forgot to mention

    Had the ECU tested
    Opened the loom in a few plaves that have wires joining up to find it looks OK
    Joins are bright no water ingress

    You can clear the fault p2296 electronically

    As soon as the car runs itís back on

    EPC lamp is lit
    Chk engine lamp is lit

    Car has reduced power


    Two fault codes one for the unplugged sensor on engine cover which goes away when air filter engine cover unit is on
    and the N276 fault


    Iíve check all the low pressure supply side today
    had the pump out to make sure we getting uplift from tank
    No silliness like splits in pickup pipe

    Iíve got 6.5 bar low pressure on a manual gauge

    Hi pressure side When running Iíve only got 8.0 bar it should be 60.0 bar

    I canít work out which way round this fault is occurring

    Would the ECU is back off the hi pressure side because of the EPC lamp
    or if the EPC lamp is on because of the fault code

    Could this car show fault code P2296 N276 short to plus because something else shared on power supply of the engine bay power relay?

    (EPC...This car has later fluid pressure brake lamp switch)

  4. #4
    Administrator Crasher's Avatar
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    I need to check the wiring diagram at work tomorrow.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

  5. #5
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    Quote Originally Posted by crisc204 View Post
    Working on the car again today

    Forgot to mention

    Had the ECU tested
    Opened the loom in a few plaves that have wires joining up to find it looks OK
    Joins are bright no water ingress

    You can clear the fault p2296 electronically

    As soon as the car runs itís back on

    EPC lamp is lit
    Chk engine lamp is lit

    Car has reduced power


    Two fault codes one for the unplugged sensor on engine cover which goes away when air filter engine cover unit is on
    and the N276 fault


    Iíve check all the low pressure supply side today
    had the pump out to make sure we getting uplift from tank
    No silliness like splits in pickup pipe

    Iíve got 6.5 bar low pressure on a manual gauge

    Hi pressure side When running Iíve only got 8.0 bar it should be 60.0 bar

    I canít work out which way round this fault is occurring

    Would the ECU is back off the hi pressure side because of the EPC lamp
    or if the EPC lamp is on because of the fault code

    Could this car show fault code P2296 N276 short to plus because something else shared on power supply of the engine bay power relay?

    (EPC...This car has later fluid pressure brake lamp switch)

    Did another hour to rule out mechanical.

    Cam Timing Spot on checked with specific tool for BLF Engine

    have worked out ECU is not requesting the fuel pump to work
    Failsafe is low pressure so no signal from ECU means only a small pressure gain from 6.5 to 8 bar

    We need 60 bar

    The N276 has two wires 12volt from fuse board and earthed through ECU which pulses the valve in the N276 to maintain required fuel pressure


    So removed the ECU signal wire from Hi pressure pump multiplug and pulsed an earth into the plug with a Powerprobe

    fuel pressure climbs instantly and safety valve opens at about 120-125 BAR
    I can hear the pump ticking away like they do normally

    Its all working mechanically

    The pump is capable of working


    I've had the ECU tested from a really good firm oop north they say it should run a car...meaning the Hardware is OK
    They've actually tested it twice because I asked them to recheck.
    They have to put different ID onto the ECU for it to work on the test rig

    SOOOOOOOOOO
    I'm back at the ECU is Borked or connections/corrosion/issue whatever on signal wire and doesn't support pulsed signal
    I'm about to rule than out with overlay loom, I kinda know its not going to fix it but need to check before I spend £400 more

    Which comes back to meaning ECU has Borked Software

    any ideas welcomed.... does that software failure even happen???
    2002 Caddy 1.9 TDI

  6. #6
    Administrator Crasher's Avatar
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    I do not trust ANY ECU testing company, not even Bosch’s own testing facility in Germany as even they have made mistakes on ECU’s I have sent them at the cost of hundreds of Euro’s.
    2003 Skoda Octavia VRS Estate. APR 98RON remap, APR R1 diverter valve, Jetex exhaust, K&N panel filter, 7.5x18 Alutec Monstr wheels with 225/40 18 Uniroyal Rainsport 3 tyres.
    2006 Polo GTI 1.8T, APR 95RON remap
    1988 Golf 2 GTI 16 valve, 2.2 with Weber Alpha injection
    1983 Golf 1 GTI 8 valve, 2 litre with Eurospec racing 42/36 head
    1972 1302LS auto 1641cc conversion

    Vile Invention

    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:

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