P0101 code - MAF

[amer6R]

Folow the hose from IC on left side it should be sround there
Loosing coolant? Probably leaky EGR or water pump

[BrennB]

Would it be around there?

[amer6R]

2 cond pic, left lower part you see that fat tube folow it down

[BrennB]

Looks like I’ll have to jack it up and take the tray off underneath to get to that maybe. Thanks

[BrennB]

Is this it? It’s actually on the big ic tube

[amer6R]

Yes it is

[BrennB]

Losing my patience with this.. Cleaned map, had a new maf sensor, new air filter and still no luck.. 30 miles into a drive glow plug light flashes everyday at the exact same spot on my way to work, Doesn’t look like any wires or leaks in pipes visually, This p0101 code only occurred a few days after I had a new dpf sensor fitted and adapted due to a previous code. Since then it’s been haunting me. I’m clueless of what to do?!

[amer6R]

I'm not sure, can someone else try to help is there maybe a fuse for MAF or DPF sensor?
I'm not sure why does the DPF sensor need to be adapter to the car

[BrennB]

When you replace a dpf sensor you have to adapt it and reset it as a new sensor wouldn’t run on what the old one reads

[amer6R]

Interesting since the sensor reads pressure inside the dpf, and temperature. You didnt replace the whole dpf to reset it to 0%

[BrennB]

I also thought you’d be able to plug in and it work but when you read up about it and I also done another post about it everyone said once fitted don’t start the car as it makes the new sensor have the old readings it has to be adapted.. since then my dpf sensor fault hasn’t come back but this p0101 code, I assumed it was my air filter it was beaten up and the wool around it was loose one day it was quite Smokey so I changed it and now every 30 miles I get this code..

[CarbonChaos]

I’d just like to add my thoughts,as you have already had a DPF issue with a new sensor fitted and adapted.
Could the DPF have been reset to zero at the same time ? Ie DPF has a level of soot but reads zero ? This in turn could cause back pressure/ a restriction ?

The below information was taken from Ross tech website associated with p0101

It is not uncommon for a TDI to set Implausible Signal Mass Air Flow Sensor (G70) faults when the engine performance is reduced due to a mechanical problem. These mechanical problems may include, but are not limited to:
Faulty electric fuel pump or Restricted fuel filter. See the Fuel Pump Basic Settings for PD, PPD, and CR TDI Engines page for Basic Settings tips after replacement.
Excessive restrictions in the intake/exhaust system
Internal camshaft/valve/lifter problems

Try a genuine fuel filter as it’s a maintenance part and an easy swop.

[Harrihealey02]

When you changed the DPF sensor to a new one, this has caused the new sensor to think like the old one which has reduced efficiency, so now the sensor is reading more air flow due to it allowing for the crud build up it thinks is still there (from old sensor adaptations) and the computer is saying use less fuel and trim back the ignition which is causing a lean air flow and the ECU probably thinks this is due to faulty maf.

[BrennB]

Oh right, So how would I go about solving the issue then? Thanks for the reply

When you changed the DPF sensor to a new one, this has caused the new sensor to think like the old one which has reduced efficiency, so now the sensor is reading more air flow due to it allowing for the crud build up it thinks is still there (from old sensor adaptations) and the computer is saying use less fuel and trim back the ignition which is causing a lean air flow and the ECU probably thinks this is due to faulty maf.

[amer6R]

Im pretty sure that you should have just cleared the fault and it would reset it readings.
You can addapt the soot level od dpf filter by average consumption x mileage.