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Author Topic: VW Passat trouble codes help  (Read 2752 times)

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tidla

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Re: VW Passat trouble codes help
« Reply #15 on: 11 October 2014, 21:39:18 »
Have you checked the actual rubber turbo hoses?

Had that code when the vehicle "popped" the large turbo hose by the alternator (below the fuel filter, which was the cause)

There`s two sensors, if there`s a pressure difference between the two ( a big hole in the pipe which doesn't always make a noise) then it will throw that code.

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Webby the Bear

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Re: VW Passat trouble codes help
« Reply #16 on: 12 October 2014, 15:25:40 »
Update.

MAF sensor unplugged. Car now flies  :) :) :) :)

Oddly though the CEL didn't come on when driven  :-\

I've cleaned it thoroughly with contact cleaner. Going to recommend a new one if it doesn't drive well with it plugged back in.

Could he drive round with it disconnected until he can afford a new one? I presume with no MAF reading the engine reverts to a default setting?  :-\
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4x4

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Re: VW Passat trouble codes help
« Reply #17 on: 12 October 2014, 15:29:00 »
Have you connected maf back up now its clean?
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Webby the Bear

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Re: VW Passat trouble codes help
« Reply #18 on: 12 October 2014, 15:30:37 »
Quote from: 4x4 on 12 October 2014, 15:29:00
Have you connected maf back up now its clean?

Yes mate. Going to give it 20 mins for the contact cleaner to evaporate and give it a test run  :y
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Webby the Bear

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Re: VW Passat trouble codes help
« Reply #19 on: 12 October 2014, 15:35:34 »
Pps, been looking in to this VNT (due to me only knowing the basics I assumed all turbos had wastegates).

in this pic...



...is the round silver diaphragm looking thing on top of the turbo with vac line.... is that the VNT actuator?
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4x4

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Re: VW Passat trouble codes help
« Reply #20 on: 12 October 2014, 15:43:29 »
Waste gate actuator which i presume is operated by the n45 electronic valve
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Webby the Bear

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Re: VW Passat trouble codes help
« Reply #21 on: 12 October 2014, 15:45:23 »
Quote from: 4x4 on 12 October 2014, 15:43:29
Waste gate actuator which i presume is operated by the n45 electronic valve

 :y
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henryd

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Re: VW Passat trouble codes help
« Reply #22 on: 12 October 2014, 16:37:45 »
Quote from: 4x4 on 12 October 2014, 15:43:29
Waste gate actuator which i presume is operated by the n45 electronic valve

No wastegate on AJM motor,variable vane jobby,what you see is the vac actuator :y

Airflow meters not expensive even from VW,circa 65quid ish
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Webby the Bear

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Re: VW Passat trouble codes help
« Reply #23 on: 13 October 2014, 13:25:24 »
Ps, guys. not bumping the thread but i been looking in to different types of turbos. these VGT (or VNT) ones seem to be the best available.

Is that still the case? Bearing in mind her dad's car is a W reg with a VNT in?
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Webby the Bear

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Re: VW Passat trouble codes help
« Reply #24 on: 13 October 2014, 13:26:33 »
And just to clarify....

the N75 valve uses vacuum to actuate the change in turbine vane angle when required between the lower and higher engine speeds????
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