On Corsa's I'm with you,
Easy test is unplug the MAF then drive it up a hill.
Then it's the MAF,
this will throw a fault code into the ECU.
But I have seen many Corsa's do this and no codes registered.
It is because the MAF is still operating within parameters but not really telling the ECU the correct air mass load.
Oh and one last thing is don't be tempted to go for budget parts,
they can be "Worse" than your original MAF.
Posted on Thursday 14th of September 2017Don't understand this? Ask a question