Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: KenJ on 24 November 2006, 10:33:55
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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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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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its an absolute doddle just make sure everything is tight, secure and in original place ;)
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What engine and symptoms?
Plus you are absolutely 100% sure there are no air leaks?
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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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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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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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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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Part number details and prices are here:
Omega Parts/Prices (http://www.omegaowners.com/forum/YaBB.pl?num=1164279437/1#1)
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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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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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Excellent advice. I will certainly make the checks you suggest before proceeding. Many thanks. KenJ
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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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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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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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I have the same fault on my 03 2.2 but no spanner light - just the one above the handbrake warning light claiming faulty emissions. AA has prepared a guide to cleaning the breathers in the Maintenance section that you could try too. I don't have part no for the throttle body gasket but it costs about £2 at Vx and the one for the sump is 92067502 at 67p - both were in stock. :o Carb cleaner from Halfords £4.99. Also you may try fuel injector cleaner - it never does any harm. :y
Please post update when you fit the MAF sensor - cos I might need one too but all the guys here keep screaming AIR LEAK so I'll try and find it first. Good luck.
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For the benefit of anyone who may be reading this and is new to the world of MAF meters...:
(http://img462.imageshack.us/img462/1851/airflowmeter90530463y22qe2.jpg) (http://imageshack.us)
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I had a defo faulty MAF sensor a few years back in my old omega, it is a diesel though. The dealer charged me a small fortune when they wrongly diagnosed injectors as the reason the light kept coming on, the car would then go into limp mode.
When I took it back about an hour later because it was doing the same thing. The technician came out and swapped the MAF sensor in front of my eyes and said, give that a try.
It was like a new car, even beter than before the fault appeared.
Never got money back for the wrongly diagnosed injectors, you will be suprised to hear >:(
Having said all that, I have had since leaking Vac pipe create a similar fault.
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For the benefit of anyone who may be reading this and is new to the world of MAF meters...:
(http://img462.imageshack.us/img462/1851/airflowmeter90530463y22qe2.jpg) (http://imageshack.us)
another spot on picture there markjay :y
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Thanks again for additional info and experience. I will let you know how I get on. Cheers. KenJ
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Hello again,
Having heeded your warnings, I removed the sensor and checked all joints for air leaks. Everything seemed OK but as a further precaution I gave the sensor a clean with a spray of Wynn's injection cleaner, put it back together carefully and tightened circlips. The warning light didn't come on for two days and I thought I'd cracked it! - but then it came on and has been intermittent since. Back to square one. I had another look at the computer printout from the garage and the notes suggested 'air leaks' even though they told me I needed a new sensor.
The fact that the car is running fine makes me loath to replace the sensor so am inclined to put up with the light coming on intermittently until I can't stand it any longer or the performance is affected. Well, that is the update as promised. Thanks again to everyone for their suggestions and help.
KenJ
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I would try giving it another clean.
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I would try giving it another clean.
I seem to recall reading that dunking it in a bucket of meths and giving it swirl around does a good job of cleaning it......tho dont go doing that unless someone else confirms it will ok to do that!
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Hello again,
Having heeded your warnings, I removed the sensor and checked all joints for air leaks. Everything seemed OK but as a further precaution I gave the sensor a clean with a spray of Wynn's injection cleaner, put it back together carefully and tightened circlips. The warning light didn't come on for two days and I thought I'd cracked it! - but then it came on and has been intermittent since. Back to square one. I had another look at the computer printout from the garage and the notes suggested 'air leaks' even though they told me I needed a new sensor.
The fact that the car is running fine makes me loath to replace the sensor so am inclined to put up with the light coming on intermittently until I can't stand it any longer or the performance is affected. Well, that is the update as promised. Thanks again to everyone for their suggestions and help.
KenJ
Sorry to hear your ongoing problems KenJ. If its any consolation my emissions light is now a permanent feature on my dash and I can't find any air leaks. Local garage suggested hooking it up to the MOT emissions machine & spraying various parts of the hoses to look for a spike when the spray mixes with the fuel - but I've not been brave enough yet.
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I would try giving it another clean.
I seem to recall reading that dunking it in a bucket of meths and giving it swirl around does a good job of cleaning it......tho dont go doing that unless someone else confirms it will ok to do that!
I was just going to ask what AA would use to clean it with. Carb cleaner label says to remove air filter and with the engine idling, spray short bursts into the air intake. This would pass over the MAF but is it thorough enough?