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Would new hybrid turbo, pipercross filter and FMDV008 trigger P0102 on ARZ?


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#1 jvoelcker

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Posted 27 June 2020 - 08:11 PM

Evening All,

 

I have just replaced the K03 turbo on my 1.8t with one running a K03S core and added the Forge 008 dump valve and a Pipercross panel filter and the engine is immediately throwing a P0102 error due to a low signal from the mass air flow sensor.

Could this be as a result of the changes or could it be that the air mass meter is actually failing?

 

The engine had been running fine, but had an exhaust manifold leak -took the turbo off to treat the leak but discovered the turbo had massive lateral play.

 

Any pointers would be appreciated.

 

Thanks.


Cheers,

Julian

2001 ABT Sportsline converted 1.8 Turbo GTI with a few extra tweaks  :)



#2 northpole

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Posted 28 June 2020 - 08:26 AM

I would clean the MAF and see if it makes a difference.. if the Pipercross has oil on it it might be the cause of the low MAF reading...   



#3 jvoelcker

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Posted 28 June 2020 - 08:51 AM

I would clean the MAF and see if it makes a difference.. if the Pipercross has oil on it it might be the cause of the low MAF reading...   

Thanks.  I have cleaned the MAF, with no effect and the Pipercross has only just been fitted so I doubt that.

 

I'm leaning towards a possible leak in the pipework now so will be checking back over all the hoses and smoke testing the inlet side of things.

 

Fingers crossed it is something easy because it was going well on the test run :-)


Cheers,

Julian

2001 ABT Sportsline converted 1.8 Turbo GTI with a few extra tweaks  :)


#4 northpole

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Posted 28 June 2020 - 09:49 AM

if you just pulled it out of the packaging than it shouldn't be a problem but if you oiled it yourself it might be a problem, it could be a simple leak or your MAF is that old it was already on it's way out... and with you adding new stuff you disturbed the wiring thus making it more obvious something is wrong... i would check the wiring and clean the connector than see if that solves it...  if not trace the loom to see if it hasn't rubbed through anywhere. 

 

this is what ross-tech says:

 

16486/P0102/000258 - Mass Air Flow Sensor (MAF/G70): Signal too Low Possible Symptoms
  • Malfunction Indicator Light (MIL) ON
  • Loss of Power
Possible Causes
  • Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70) faulty
  • Mass Air Flow Sensor (MAF/G70) faulty
Possible Solutions
  • Check Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70)
  • Check/Replace Mass Air Flow Sensor (MAF/G70)

 

So i doubt it's anything else than either MAF the connector to the MAF or the wiring to the MAF or you haven't pushed it on all the way (happened to me once on a audi TT 1.8t) 



#5 jvoelcker

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Posted 28 June 2020 - 06:13 PM

I've cleaned the sensor, but was pretty tidy.

 

The wiring has been checked and the sensor is receiving all it needs and there is a signal coming it and picked up by VCD.

 

Having changed the turbo, filter and valve I warmed it up, all ok with no leaks, took it for a test drive and within a mile the engine lost power momentarily then was back, but the check engine light was thrown and it dropped in to limp home mode.

 

The P0102 code is thrown now as soon as the car is started.

 

I had thought it may have been a blown hose, but nothing obvious and a smoke test didn't show any leaks.

 

So I guess I'll have to bite the bullet and order up a new sensor in the morning,

 

It just seemed a bit sudden for a sensor to fail like that so I was suspecting other factors.

 

I specialise in Toyotas and with some of their ECUs the boost issues can be flagged up as air mass meter issues and vice versa.


Cheers,

Julian

2001 ABT Sportsline converted 1.8 Turbo GTI with a few extra tweaks  :)


#6 northpole

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Posted 29 June 2020 - 09:45 AM

Yeah some times it does but if it keeps coming back after a wipe at start up than it must be the MAF being the culprit... whatever you do replace it with OEM not a cheaper version the VAG group cars are very particular with sensors and even the slightest deviation of the oem specs will result in a problem. 



#7 jvoelcker

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Posted 29 June 2020 - 06:35 PM

Well VAG no longer sell them, but have a good VAG parts company across the valley so popped round this morning and picked one up and problem solved - car running well.

 

Working with Toyota 4x4s with few sensors, most of the time they falter and then die to you have fair warning for lining up a replacement.

 

Now to get the car booked in for a remap :-)

 

Thanks for the hand holding :-)


Cheers,

Julian

2001 ABT Sportsline converted 1.8 Turbo GTI with a few extra tweaks  :)


#8 northpole

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Posted 30 June 2020 - 09:00 AM

glad to hear it's sorted and that was no hand holding at all it was just pointing you in the right direction, every single one of us at some point needed some help/ guidance and with cars you always learn something new or specific for that brand or the model car or a certain engine... 







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