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General Automotive General automotive discussion. This is intended to be a discussion about other not VW and Diesel cars you may have or interested in.

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Old July 10th, 2018, 13:42   #1
tbaxter08700
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Join Date: Jul 2018
Location: Uk
Default Help with fault codes

Hiya guys just signed up to the forum! Had td all my life bur always had Peugeot's. Anyway I got a mk 5 golf gt tdi 140 remapped to 180ish.

Main problem I have is lump mode at around 60mph. Read the codes and have the following.

P0299 - underboost condition

P0101 - Mass or Volume Air Flow "A" Circuit Range/Performance

P0401 - Exhaust Gas Recirculation "A" Flow Insufficient Detected

The EGR is more than likely because it's been capped off so that's OK for now.

Mass air flow does that mean possibly dirty sensor?

Now the underboost is my main concern as I think this is what trips limp mode. The car apparently had a new turbo last year so hopefully it's not that. Maybe a leak? The tuebo does whistle loud but not sure that's how the car is or maybe because it's been remapped?

Is there any live diagnostics I can do to help figure this out? Any help would be very much appreciated.

Thanks in advance



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