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Author Topic: Error 74  (Read 1045 times)

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Kate

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Error 74
« on: 28 October 2009, 11:57:27 »
Hi everyone.  Does anyone know what causes error 74, besides the MAF sensor itself?

I was going to buy a new one but some people seem to think that this might not fix error 74.

Any advice is greatly appreciated! :-*
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Kate

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Re: Error 74
« Reply #1 on: 28 October 2009, 14:15:40 »
Could it be the EGR valve?
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Kate

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Re: Error 74
« Reply #2 on: 28 October 2009, 14:30:03 »
No-one's got a clue have they? ;D ;D ;D
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Gaffers

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Re: Error 74
« Reply #3 on: 28 October 2009, 14:51:25 »
They do but everytime they come on this thread to post the answer they get distracted by your avatar and forget why they came on here..... ;D ;D
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Kate

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Re: Error 74
« Reply #4 on: 28 October 2009, 14:54:47 »
Come on lads - concentrate!!!

Error 74, could it be the EGR valve?
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rustym95

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Re: Error 74
« Reply #5 on: 28 October 2009, 15:03:34 »
have you look'd in side the MAF, should see 2 glass strips with copper on them, should shine back at you, replaced mine as the copper had gone green, when took it apart after getting a new one and it had burnt out, usually if somthing else has gone would throw up more codes like throttle or egr or air temp would think so any way :y :y
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Kevin Wood

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Re: Error 74
« Reply #6 on: 28 October 2009, 15:11:56 »
Phwoar... erm <blinkers on>

74   Mass Air Flow Sensor Voltage High

I'd be surprised if it was the EGR, to be honest./ You could always try blanking off the EGR by cutting out a section of coke can to bolt down between the valve and the mounting flange.

If you can get it to a tech 2 it might be useful to see the live data. See what the MAF is reading.

Failing that, try unplugging the MAF and take it for a little drive. It'll probably throw more fault codes but it will substitute limp-home values for the data and, if the running issues improve, might point to a bad MAF.

I assume this is the only code you are getting? It can come up spuriously in combination with other problems.

kevin
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Kate

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Re: Error 74
« Reply #7 on: 28 October 2009, 16:14:46 »
I changed the MAF for a used one and the strips look quite shiney.  The car runs fine now so far but I still get code 74.

I wanted to try and get it sorted in case something else goes wrong and my mig breaks down.

Thanks for your help! :-* :-* :-* :-* :-*
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Gaffers

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Re: Error 74
« Reply #8 on: 28 October 2009, 16:20:05 »
You will continue to get 74 until the car has been started 20 times.  Then it will clear as long as the problem has gone away :y
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Kate

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Re: Error 74
« Reply #9 on: 28 October 2009, 16:33:36 »
Quote
You will continue to get 74 until the car has been started 20 times.  Then it will clear as long as the problem has gone away :y

Thanks very much, I never knew that! :-* :-* :-*
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Kate

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Re: Error 74
« Reply #10 on: 28 October 2009, 19:07:09 »
I think it might be fixed now. Never stalled once today.
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TheBoy

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Re: Error 74
« Reply #11 on: 28 October 2009, 19:27:19 »
yup, code will disappear in a while if ecu happy again.
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Kate

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Re: Error 74
« Reply #12 on: 28 October 2009, 19:59:09 »
Thanks TB! :-*
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