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Thread: Underboosting/supercharge issues GOLF 1.4 TSI GT 160BHP!

  1. #1
    Junior Member
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    Apr 2015
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    Underboosting/supercharge issues GOLF 1.4 TSI GT 160BHP!

    I am hoping you can save my bacon again, like you did (God knows why my 2 local VW Garages didnt even suggest this was the problem!) when i had issues with my loss of power which required a new air control flap on my 2009 Golf 1.4 TSI GT 160PS.

    So the problematic 2009 Golf GT 1.4 TSI is striking again! If I'd known this was a known fault on this model of engine i wudn't have got this motor!

    Just last week Gordon the golf went to 100,000 miles on the clock but has developed a power issue (oh no, not again!) I'd say the turbo or supercharger is only working at about 70%. Power is still there but not how it should be, still got overtaking power. Getting abit of a more noticable whooshing or swishing sound of the turbocharger/supercharger when accellerating, also, soot appearing on tailpipes. When starting car, getting a slight tapping/rattle noise from engine which last about 2-3 seconds. (IS THIS THE DEATH RATTLE????) Diagnostic code comes up as :P02CB TURBOCHARGER/SUPERCHARGER UNDERBOOST CONDITION. I'm trying not to get rid of this beast of a car, trying to remain optamistic thats its not gonna cost me a fortune to fix, I am hoping and praying you can give me some advice or a diagnosis of what needs doing please.

    Given up on VW garage now. But my brain keeps saying An Audi A3 S-line would look very nice on my driveway! Lol.
    2009 Golf GT 1.4 TSI 160PS

  2. #2
    Administrator Keithuk's Avatar
    Join Date
    Jun 2012
    Stoke on Trent
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    The slight tapping/rattle noise sounds like the hydraulic valve lifters not filling with oil.

    EOBD II Error Code: P02CB

    Fault Location:
    Turbocharger/Supercharger 'B' - Underboost Condition

    Possible Cause:
    Manifold Absolute Pressure (MAP) Sensor (G71).
    Turbocharger/Supercharger boost pressure sensor.
    Turbocharger wastegate actuator.
    Mechanical fault.
    Engine Control Module (ECM).

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s).
    Read Measuring Value Blocks (MVB).

    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.

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