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Author Topic: Mass air flow sensor  (Read 4006 times)

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KenJ

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Mass air flow sensor
« on: 24 November 2006, 10:33:55 »
Have trawled through the forum but can't find answer to this one - maybe i've missed it!
The 'spanner' light started showing and I had a computer diagnosis - told it was air flow sensor - £145+VAT! Have found a new sensor on ebay for £43 but wondered whether fitting is a DIY job? It appears to be 2 circlips plus a plug for the elctronics. Any advice please? KenJ
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Omega-MV6

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Re: Mass air flow sensor
« Reply #1 on: 24 November 2006, 10:45:44 »
Yeah I gotta say, I think it really is that simple... I think it's only matched to the Engine Type... eg 3.0ltr, 2.5 ltr, 2.0ltr etc, not the specific ECU.
Well, at least mine got wet + I also dropped it to, and I don't think that helped it demise. I replaced with a second hand one from another 3.0ltr, all I did was swap it over and plug it in... worked a treat...  :)

Cheers.

Matt
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Markie

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Re: Mass air flow sensor
« Reply #2 on: 24 November 2006, 10:57:28 »
its an absolute doddle just make sure everything is tight, secure and in original place  ;)
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Marks DTM Calib

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Re: Mass air flow sensor
« Reply #3 on: 24 November 2006, 12:22:53 »
What engine and symptoms?


Plus you are absolutely 100% sure there are no air leaks?
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nixoro

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Re: Mass air flow sensor
« Reply #4 on: 24 November 2006, 12:58:50 »
I'm sure someone on here said you could clean these if your careful. :-/

Not 100% sure but I'm sure someone will be able to confirm if it doable. :y
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Ghosts in my machine

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Re: Mass air flow sensor
« Reply #5 on: 24 November 2006, 13:00:41 »
I got that fault code when the breathers were blocked up the first time. Cleaned them out and fault code went on its own.
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Boiler Man

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Re: Mass air flow sensor
« Reply #6 on: 24 November 2006, 13:10:45 »

Someone correct me if I'm wrong

But make sure the one on fleebay is the correct one for your engine, I think they are all differant.

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Markie

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Re: Mass air flow sensor
« Reply #7 on: 24 November 2006, 13:53:17 »
Quote
Someone correct me if I'm wrong

But make sure the one on fleebay is the correct one for your engine, I think they are all differant.

:y yup, confirm part umber on side of it with any potential new one to be 100% IF you do need to buy one,
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Marks DTM Calib

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Re: Mass air flow sensor
« Reply #8 on: 24 November 2006, 13:58:55 »
Part number details and prices are here:

Omega Parts/Prices

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KenJ

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Re: Mass air flow sensor
« Reply #9 on: 24 November 2006, 14:00:54 »
Thanks very much everyone. A great and prompt response.  I did forget to mention that it's a 2003 2.2. There are no actual symptons as far as the running is concerned - only the light coming on intermittently>The garage's computer indicated airflow sensor and they said that it was a common problem on Omegas - then quoted the price! Although I am loath to pay out £145+VAT, I thought that £43 plus a little DIY might be worth it. Thanks again. Ken J
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Marks DTM Calib

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Re: Mass air flow sensor
« Reply #10 on: 24 November 2006, 14:21:07 »
Its such a common fault on Omegas that I have never seen one fail other than through physical damage.

Its VERY commonly wrongly diagnosed when there is an airleak.....because the ECU thinks the MAF is reading low due to unmetered air getting in.......if the dealer had been compitent they would have looked at the live data and operated varoious actuators like EGR....to see the reaction.

I would

a) Check the air inlet trunking for splits/damage.
b) Check the breathers etc are all clear and secure with no splits.

But, do consider the following:

If you just change the MAF and the problem isn't fixed (likely given the lack of proper analysis by the dealer) then you are then left pondering if

1) The ebay sourced item is good or also faulty
2) If there is another problem.

And then it becomes a messy willy nilly part changing process which is expensive.

Make sure you rule out the obvious before changing anything.
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KenJ

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Re: Mass air flow sensor
« Reply #11 on: 24 November 2006, 14:55:19 »
Excellent advice. I will certainly make the checks you suggest before proceeding. Many thanks. KenJ
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TheBoy

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Re: Mass air flow sensor
« Reply #12 on: 24 November 2006, 18:35:26 »
It does sound as if air leak could be problem, rather than MAF.  MAFs are quite reliable (unless some plonker has stuck his fingers down it).  Failing Lamdas can also flag up MAF...
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Big Steve

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Re: Mass air flow sensor
« Reply #13 on: 24 November 2006, 19:30:58 »
Had to replace my MAF sensor couple of years back, took the meega to vauxhall when it was playing
up had a diagnostic, told it was the MAF, did not know it was easy to replace so left it with them, they
fixed it then handed me a bill for over £300, i wish i had this site then. :(
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Markjay

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Re: Mass air flow sensor
« Reply #14 on: 25 November 2006, 13:41:35 »
It is very common for garages to say that the problem with the car is very common... for some reason it seems to put owner's mind at ease. When a garage next says this to you, ask them if they have the part in stock - if it is a common problem inded then they would have loads, but if they have to order it than you know it's all BS....

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