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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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Engine Service Required - MAF CleaningViews : 6288 Replies : 17Users Viewing This Thread : |
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Apr 17th, 2013, 20:00 | #1 |
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Engine Service Required - MAF Cleaning
I'm in the middle of doing a service on our XC90 so I had some tools and MAF Cleaning Spray in the boot when the car lost power and the dreaded "Engine Service Required" appeared. I was on my way home from Plymouth when it happened, 4 times in total. The 4th time I decided to pull onto the services to see if it was anything obvious like a split pipe or loose connection.
Having owned quite a few diesels over the years I knew the simple things to check, fuel filter, MAP sensor, MAF sensor etc.. As the MAF sensor on our XC90 is easy to get to I removed it, shone a torch on the MAF element(small thin wire) and could see it was dirty so I grabbed the MAF cleaning spray out of the boot and gave it several good blasts. Didn't want to wait for it to slowly dry so I took it into the gents toilets and used the hand dryer. Fitted it back on the car and it drove home 200+ miles perfectly, infact I'm sure it feels better now than when I first brought the car. |
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Apr 17th, 2013, 20:35 | #2 | |
Well la dee frickin' da
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Apr 17th, 2013, 22:50 | #3 |
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did you use isopropyl alcohol spray?
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Apr 18th, 2013, 02:47 | #4 |
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I've no idea.
This is what I used. http://www.youtube.com/watch?v=vPT8rL0noYg I've attached a couple of PDF documents that I have for it. I haven't read them(yet), didn't really have time stuck on the services. Have a read, maybe it does contain "isopropyl alcohol". One thing I do know, its specially formulated to do the job and it definitely works, my car feels better now than when I brought it. Last edited by Shadeyman; Apr 18th, 2013 at 02:57. |
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Apr 18th, 2013, 06:40 | #5 | |
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in case anyone else should have the same problem, and fancies trying this ? Cheers,
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Apr 18th, 2013, 07:36 | #6 |
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Apr 18th, 2013, 09:31 | #7 |
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@Coconut
Here's a photo of the engine bay, a red arrow showing the position of the MAF sensor. Here's a photo of the MAF sensor, unplug the connector the red arrow is pointing to. The red arrows show the 2 torx screws and jubilee clip that have to be undone. Here's a photo of the MAF sensor removed, a red arrow shows where you should direct the MAF cleaning spray. The small wire is difficult to see unless you have a torch. Hope that helps ... |
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Apr 18th, 2013, 09:36 | #8 |
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Cool, cheers fella
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Apr 18th, 2013, 09:53 | #9 |
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Bosch MAF sensors have a self clean cycle, If I remember correctly the sensor wire is heated for about 5 seconds every time the engine is turned off. I'm sure the wire glows red, yes it does get that hot. While the heat it produces burns 99.9% of the crap that does find its way onto the wire, the stuff doesn't always fall off the wire, some stuff clings on causing false readings and in my case the "Engine Service Required" error. Using MAF cleaning spray helps to dislodge those stubborn bits of crap and return the MAF sensor to its former glory.
EDIT. I've just attached a PDF document to this post. Its an interesting read if you want to know a little more about MAF Sensors. Last edited by Shadeyman; Apr 18th, 2013 at 10:16. |
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Apr 18th, 2013, 11:07 | #10 |
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Had a bit of a mooch about on the web, and Halfords Electrical Contact cleaner seems to get good reviews for MAF cleaning. And it's only £4 compared to the bespoke MAF cleaners out there.
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