Skoda Octavia Estate - Mass air flow meter

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Sat 29 Mar 2014 20:33
Skoda Octavia Estate - Mass air flow meter - zhr1849
Skoda octavia 1.9 tdi taxi high miles
Engine management light came on got it put on a computer came up with mass air flow sensor code g70 signal too low p0102 so replaced with new air mass unit
Light back on again
please help as i got test in couple of weeks and cant afford to spend too much money on it.
Regards
Zhr
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Sun 30 Mar 2014 09:41
Skoda Octavia Estate - Mass air flow meter - injection doc
It's needs further checks, causes could be

Cheap air flow meter
Air leak
EGR valve fault
Partially blocked exhaust
Wiring issue
Corroded wiring
Cambelt timing

Just to name a few. All the AFM is doing is monitoring how much air the engine is drawing in and the ECU calculates the fuel required. The reason a fault flags up is when the monitored air flow is outside of the ECU expected calculations known as parameters
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Sun 30 Mar 2014 12:41
Skoda Octavia Estate - Mass air flow meter - Railroad.
You have made the classic mistake of assuming that a faulty mass air flow sensor is the cause of a reported fault of low air flow. Indeed the sensor could be the problem, but so could many other things mentioned above that would cause a loss of air flow. The ECM cannot tell the difference, and that's why thus fault code is generated.
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Sun 30 Mar 2014 22:10
Skoda Octavia Estate - Mass air flow meter - zhr1849
Hi thank u for ur advice i will have look again tomorrow will keep u guys posted
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Mon 7 Apr 2014 23:08
Skoda Octavia Estate - Mass air flow meter - zhr1849
Hi all
All sorted after all that, changing mass air flow etc
It was wiring fault break in a wire thanks guys
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Tue 8 Apr 2014 09:03
Skoda Octavia Estate - Mass air flow meter - craig-pd130

Thanks for reporting back on what the real fault was -- it is really useful to know the actual causes, and how they were fixed, as this is what really helps other people.

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Wed 9 Apr 2014 14:53
Skoda Octavia Estate - Mass air flow meter - Gibbo_Wirral

Absolutely. A customer of mine was told his car needed a new MAF at £140 plus fitting plus VAT. To add insult to injury they charged the full hour labour rate when its a ten minute job.

It turned out to be a broken air filter box at the back of the engine letting in too much air.

A self tapper in each corner and all was well again.

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