Seat Leon MK2 - VCDS Error P0102 - HELP! ASAP PLEASE :)

[FR.MAN]

Hi All

I got a Seat Leon Mark 2 1.9 TDI, and keep getting error "emissions workshop!" although car has power, turbo kicks in well, fuel consumption as normal just an annoying yellow engine management light on dashboard.

Plugged it into VCDS/VAG.COM got the following error:
Fault Found:
16486 - Mass Air Flow Sensor (G70)
P0102 - 000 - Signal too Low
Freeze Frame:
RPM: 798 /min
Torque: 29.3 Nm
Speed: 0.0 km/h
Load: 0.0 %
Duty Cycle: 65.3 %
Bin. Bits: 00101111

I cleaned out the EGR VALVE, cleaned the maf sensor inputs.
Double checked all wiring for breakages.
Swapped the sensor with a genuine from dealers working one.
Still no luck!!

Deleted the error, however after restarting the car on second go the eror on the dashboard returns with the engine management light

Seat Dealers are wanting £49.99-£69.99 for a diagnosis to find the culprit and are not free until end of week, which will be last resort....

ANY SUGGESTIONS/HELP/HINTS TIPS ANYONE ANY HELP GREATLY APPRECIATED

 

[andy.morgan]

Sounds like a faulty MAF

http://wiki.ross-tech.com/wiki/index.php/16486/P0102/000258

 

[FR.MAN]

Changed it with a working genuine one.. Only difference was instead of the error coming up when starting the car for two times before warning light came.. It came on third attempt to start..

When changed the maf and tried in a different car no errors no faults nothing..

 

[Dan FR]

Does it only come back at idle? Could be a faulty EGR valve causing the low MAF readings if recirculating more air than it should

Have you tried reading live data with VCDS, sure you can run checks on the EGR, check what the MAF is actually reading at idle/normal driving etc

 

[FR.MAN]

Does it only come back at idle? Could be a faulty EGR valve causing the low MAF readings if recirculating more air than it should

Have you tried reading live data with VCDS, sure you can run checks on the EGR, check what the MAF is actually reading at idle/normal driving etc

Yeah thats correct, only comes back upon starting the car. If I reset the car I have drove it 30 miles plus on dual carriageway, motorway etc the engine management light does not come on. But as soon as i turn it off and start second time. The error reappears.

Think i'll read the live data and see if I can get hold of a genuine working egr valve at same time..

 

[FR.MAN]

Live data for M.A.F showed 365.51g on pulling away then throughtout test showed 0.00 then pulling up showed 87.42..

 

[FR.MAN]

Sounds like a faulty MAF

http://wiki.ross-tech.com/wiki/index.php/16486/P0102/000258

Tried same part number, brand new dealers maf

No luck...

 

[GUINNESS73]

I have had this same fault for a couple of weeks now. No symptoms... driving problems or power etc. Cleaned the MAF and sensor plug in case it was dirty. I will have a look at the live data as you suggest. I will be back