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  1. #1
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    A6 2.5 TDI 00575 Inlet manifold pressure exceeded

    Please help

    A6 2.5 TDI AFB 00575 Inlet manifold pressure exceeded.

    Symptoms include intermetent loss of power, ranging from total loss & having to cruise to a stop on the hard shoulder to partial loss i.e. wont rev beyond 3k & then gradually falls off.
    Particularly bad first thing in the morning (within first 1/2 mile of my journey) or when accelerating hard to overtake or get up to speed on motorway slip road.

    The above code if cleared, will return after the first loss of power incident.

    I've checked all vac hoses & they seem to be OK.
    It doesn't smoke.
    VGT actuator seemed to operate fully & smoothly last night when & sypathetic Audi tech ran a test with his gadgetry (does this also confirm N75 performance?)
    Also during test with same gadgetry boost was found to be operating within acceptable parameters.
    MAF was fine at tickover but showed a shortfall when on throttle.
    Any pointers would be gratefully recieved.
    Scott

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  3. #2
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    "MAF was fine at tickover but showed a shortfall when on throttle."

    Im new to these engines but would the above not indicate a faulty sensor?

  4. #3
    Jimbo.King's Avatar
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    I had same symptoms / fault code with mine a couple of months ago, i too checked all pipe work from actuator to N75 boost control valve, made sure actuator on turbo was moving free etc, cleared the code and took it for a drive and it was still the same,
    So next i removed the electrical connector plug from the N75 and sprayer the connectors with contact spray and its been fine ever since, worth a try.
    If still no luck id say the N75 valve is giving you problems.

    2007 A4 3.0tdi Quattro S-line, Lava Grey Pearl, 229+bhp, 6 speed manual, Cruise control, Auto wipers/lights, Parking sensors all round, RNS-E Sat Nav, Heated Volterra leather, Adaptive Bi-Xenon plus headlights, Bluetooth phone prep/voice control, DRL, i-Pod dock, Coming home lights, A4 B5 front spring seat mod, LED DRL/side light/numberplate lights, Window tints, Cupra R front splitter, Black front grill, 3.5" custom tail pipes, 8.5x19 Calibre Excalibre wheels running 225/40/19, ET30-R ET35-F.

  5. #4
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    Post dynamic log of channel 11 from VCDS. Floor it from 1500rpm until redline. Also 3rd and 8th will be usefull for diagnosis for beginning (also dynamic but logged in three separate runs).
    Professional chiptuning (most makes and models) and diagnostics (VAG, BMW, Vauxhall).

  6. #5
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    a6 2.5 tdi intermitently losing power.

    Quote Originally Posted by devine0969 View Post
    Please help

    A6 2.5 TDI AFB 00575 Inlet manifold pressure exceeded.

    Symptoms include intermetent loss of power, ranging from total loss & having to cruise to a stop on the hard shoulder to partial loss i.e. wont rev beyond 3k & then gradually falls off.
    Particularly bad first thing in the morning (within first 1/2 mile of my journey) or when accelerating hard to overtake or get up to speed on motorway slip road.

    The above code if cleared, will return after the first loss of power incident.

    I've checked all vac hoses & they seem to be OK.
    It doesn't smoke.
    VGT actuator seemed to operate fully & smoothly last night when & sypathetic Audi tech ran a test with his gadgetry (does this also confirm N75 performance?)
    Also during test with same gadgetry boost was found to be operating within acceptable parameters.
    MAF was fine at tickover but showed a shortfall when on throttle.
    Any pointers would be gratefully recieved.
    Scott

    i have exactly the same problem have you managed to resolve your problem.

  7. #6
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    i would appreciate any info on this problem please i have the same fault code and same symptoms on my audi a6 2.5 tdi

  8. #7
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    did you resolve your problem.

  9. #8
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    what does this all mean.

  10. #9
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    Quote Originally Posted by devine0969 View Post
    Please help

    A6 2.5 TDI AFB 00575 Inlet manifold pressure exceeded.

    Symptoms include intermetent loss of power, ranging from total loss & having to cruise to a stop on the hard shoulder to partial loss i.e. wont rev beyond 3k & then gradually falls off.
    Particularly bad first thing in the morning (within first 1/2 mile of my journey) or when accelerating hard to overtake or get up to speed on motorway slip road.

    The above code if cleared, will return after the first loss of power incident.

    I've checked all vac hoses & they seem to be OK.
    It doesn't smoke.
    VGT actuator seemed to operate fully & smoothly last night when & sypathetic Audi tech ran a test with his gadgetry (does this also confirm N75 performance?)
    Also during test with same gadgetry boost was found to be operating within acceptable parameters.
    MAF was fine at tickover but showed a shortfall when on throttle.
    Any pointers would be gratefully recieved.
    Scott
    have you had any joy with resolving this problem

  11. #10
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    I have exactly the same fault code and same problem and was wondering if you had any joy in resolving yours
    if so could you please give me any pointers thanks Danny.

 

 

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