P0100 fault code

[MiscMan]

Hi,

When accelerating I'm getting an engine fault warning P0100. I've replaced the MAF with s new part but the fault is still persisting. I've tried running the car without the MAF plugged in and it runs perfectly? Any ideaon what else could be causing this fault?

Cheers

James

[WTF]

Jamie from SP Tuning may be able to offer some help He'll be along shortly I'm sure.

[Jamie@SPTuning]

Silly question but did you clear down the fault after fitting the new sensor?

[MiscMan]

Yes the fault code was cleared before it was fitted.

No idea what else could be causing it!

[Jamie@SPTuning]

Can you see live data reading from the sensor?

[MiscMan]

Hi Jamie,

Yes, I should be able to. Not sure what I need to be looking for though?

Cheers

James

[Jamie@SPTuning]

What engine do you have?

[MiscMan]

The car is a 1.6 Diesel HDI.

[MiscMan]

Could this be caused by a vacuum leak? I can hear a hissing sound to the left of the engine but can't see any obvious problems with the hoses?

[Jamie@SPTuning]

If you look at specified and actual air flow values it will point you in the right direction for the fault. If you have a split in the turbo intake pipe side of things you'll get a low air flow reading as unmetered air is entering the engine. Also if your EGR valve is not in the correct operating position the air flow will be low or even high.
Lexia diagnostics might show a more specific fault code also. Generic eOBD readers don't show all manufacturers faults that are logged.