Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Kate on 27 October 2009, 16:41:47

Title: Mass Air Flow Sensor Voltage High
Post by: Kate on 27 October 2009, 16:41:47

Hi. I did the paper clip test and got error 74 Mass Air Flow Sensor Voltage High.

Does this mean that I need to change the MAF sensor or could it be something else at fault?

Thanks for any advice! :-* :-* :-*

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Bent valve on 27 October 2009, 17:37:43

Try cleaning the Maf connector first with electrical contact cleaner.  if this dosent work the easiest thing to do is change the MAF. If you dont have a spare one to try, and you dont want to fork out for a new one, You could try removing the MAF and spraying the sensor with electrical contact cleaner, but this always seems to be a short term fix.

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Kate on 27 October 2009, 18:19:52

Thanks Mick. Would a MAF from a 2.5 fit?

Title: Re: Mass Air Flow Sensor Voltage High
Post by: I_want_an_Omega on 27 October 2009, 18:26:10

Good idea, I dont see that it would do any harm and is easy enough to get to to swap out.

Just make sure there is no risk the fan could start whilst working on it - probably best to disconnect the battery

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Kate on 27 October 2009, 18:30:21

Yes I thought I could test the part off my 2.5 rather than replace a part that's not kaputt!

Title: Re: Mass Air Flow Sensor Voltage High
Post by: I_want_an_Omega on 27 October 2009, 18:33:59

I thought thast where you were going.

If it transpires to be the culprit then I have a spare one (for a 2.5) which could be available at a reasonable price.

Did you make any more progress on the sat-nav mystery?

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Kate on 27 October 2009, 18:38:09

I'm still a bit confused about the sat nav.  The only bit I seem to have is the screen! ;D

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Bent valve on 27 October 2009, 18:39:11

Quote

Thanks Mick. Would a MAF from a 2.5 fit?

It should be the same. early ones had a different connector though, check yours is the same before you remove it.

Title: Re: Mass Air Flow Sensor Voltage High
Post by: TheBoy on 27 October 2009, 18:40:32

Maf faults could be an air leak.  Also, it you have a 19 code, that tends to throw erroneous 74s.

The MAFs on the V6 are generally very reliable, though seen a handful now that have genuinely failed (still seen more that have been misdiagnosed as MAF fault)

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Kate on 27 October 2009, 18:40:58

Quote

Quote

Thanks Mick. Would a MAF from a 2.5 fit?

It should be the same. early ones had a different connector though, check yours is the same before you remove it.

OK, will do.

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Kate on 27 October 2009, 18:50:28

Quote

Maf faults could be an air leak.  Also, it you have a 19 code, that tends to throw erroneous 74s.

The MAFs on the V6 are generally very reliable, though seen a handful now that have genuinely failed (still seen more that have been misdiagnosed as MAF fault)

Nothing is ever simple on a mig is it! ;D

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Welung666 on 27 October 2009, 18:52:01

Quote

Quote

Maf faults could be an air leak.  Also, it you have a 19 code, that tends to throw erroneous 74s.

The MAFs on the V6 are generally very reliable, though seen a handful now that have genuinely failed (still seen more that have been misdiagnosed as MAF fault)

Nothing is ever simple on a mig is it! ;D

Only the drivers ;D ;D

Title: Re: Mass Air Flow Sensor Voltage High
Post by: dbug on 27 October 2009, 22:49:26

Kate I had same problem of stalling as you.  Usually cleaning MAF not succesful - clean contacts first or swap. I got one off ebay for just over £30 and problem solved!! Won't say I told you so - http://www.omegaowners.com/forum/YaBB.pl?num=1256470369;quote=11

Title: Re: Mass Air Flow Sensor Voltage High
Post by: Kate on 29 October 2009, 18:57:05

Seems like it is sorted now. Thanks everyone, brilliant as usual! :-* :-* :-* :-* :-* :-*