Fault Code Help Please

[Sundayjumper]

The check engine light came on last night, with my scanner I read the following error:

1A [026] Multiplicat. mixture adaptation, bank 1, control limit reached

That was the only error. I cleared it and went for a drive and everything seemed fine but the light came back on less than a mile after leaving home this morning. I've not re-read the codes yet.

Any ideas ? Lambda sensor(s) ? MAF ? Although I'd expect a MAF problem to affect both banks equally.

I'm trying to sell the car at the moment so this is really awful timing !

[Sundayjumper]

Today's errors:



MAF ?

[stevox5]

I would check for an air leak mate what engine size is your car ?

[Sundayjumper]

Sorry, I should have specified. 2001 4.4i with 115k miles on it.

[stevox5]

Try removing the main engine cover above the intake manifold in the v of the engine ( four small bolts) if you then look down at the rear of the black plastic inletmanifold you will see two breather pipes apron 20 mm in diameter horizontally positioned . You will probably find these have gone very soft and split badly causing the air leak.
Good luck

[Sundayjumper]

OK, thanks, I'll check that out.

[Sundayjumper]

I didn't get around to checking those pipes, but I took the MAF off and gave it a good clean, and the error hasn't come back. Engine seems to run a bit smoother too. I'm hopeful that's all that was needed !