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Jocee458



Member Since: 12 Apr 2021
Location: Midlands
Posts: 3
United Kingdom 
Fault code P101
Hi, I’ve got a 2013 defender 90. The engine management light has come on and I’ve had the diagnostics linked up. It’s coming back with code P101 which he says is a faulty mass air flow sensor. Does this sound about right and if so where’s the best place to purchase one from. I’m UK based. Also is it easy enough to do yourself? Thanks
Post #897859 12th Apr 2021 11:40pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240
United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
The MAF sensor is very easy to access as it's attached to the outlet pipe on the lid of the airbox. It's secured by one small Torx bolt:


Click image to enlarge
If that's what the fault code says then it's worth giving it a clean as a first step to see if that makes any difference.

It's also worth checking the condition of the wiring to it as they have a habit of fraying due to the long, unrestrained cable to it:


Click image to enlarge
If the wiring is damaged then you can buy repair sections from the site shop and details of how to fix it can be found here:

https://www.defender2.net/forum/post853238.html#853238

If you do need a new sensor then the part number is LR019830. A genuine part from Land Rover is around £170 but you can buy OEM quality replacements for under £70 from the likes of Island 4x4:

https://www.island-4x4.co.uk/flow-mass-sen...-8185.html Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

Last edited by LandRoverAnorak on 13th Apr 2021 9:03am. Edited 1 time in total
Post #897883 13th Apr 2021 8:10am
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Jocee458



Member Since: 12 Apr 2021
Location: Midlands
Posts: 3
United Kingdom 
Hi,
Thanks for the reply. Guess what hubby will be doing over the next few days. 😳😊
Post #897897 13th Apr 2021 9:01am
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240
United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
Lucky him Laughing Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #897899 13th Apr 2021 9:04am
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Jocee458



Member Since: 12 Apr 2021
Location: Midlands
Posts: 3
United Kingdom 
Hi. Just thought I’d update you. So we (my husband) 🤪😂😂 changed the mass air sensor and the light was still on. He then checked all the hoses and found a split in one. Temporary repair and light now off. 😊😊😊 Happy days. Thanks for your help.
Post #899472 22nd Apr 2021 10:09am
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