underboost

  1. G

    p0299 Control Range Not Reached

    The car is an Avant 2.0 TDI. I've been trying to solve this pesky fault code that frequently results in limp home mode. So far I've replaced two charge pressure hoses. One had a pretty nasty tear, but clearly wasn't the only culprit. I was hoping that someone smarter than me would be able to...
  2. N

    Turbo Underboost Diagnosis

    So I would like some help in diagnosing a periodic underboost issue and intermittent limp mode please. I have an A3 8P TDI CR 2.0 140 with 118k on the clock. My driving style is more to the italian side than miss daisy and the car does primarily motorway miles (in the region of 600mi a week at...
  3. M

    A3 8p P0299 turbo underboost

    Hi guys, new to this forum. I have an 06 plate A3. Lately it has been going in to limp I suppose, for a while MIL was on and the other morning it was due to go in to Audi for diagnosing, sure enough on route no issues and MIL went off mid drive. I took it in anyway but short of the error code...
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