 | Home > Puma (Tdci) > MAF Sensor P0101 Code / Limp Mode |
 
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1997  
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Check air filter is clean, check pipes and clamps from air filter box to turbo. Check wiring connector and harness to MAF. It could also be a faulty MAF sensor.
Are you getting any woosh sounds when you accelerate onto the motorway? If so you may have a slight split in the intercooler which exhibits the issue at high revs and boost pressure that does not happen at lower revs and boost. Likewise it could be a slight split in a hose from the turbo to intercooler or intercooler to inlet manifold. The latter being a rubber hose then a metal pipe then a rubber 90 degree bend to the inlet manifold. The fact that the check engine light goes out after a medium journey indicates the triggered fault has been tested several times during the journey and not reoccurred. You can check the intercooler by taking the front grill off , if you have aircon it will be sandwiched between the aircon at the front and the rad at the back. The Intercooler tends to split at the crimped edge on the left hand side as you look at it from the front of your defender. |
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20th Feb 2022 8:37pm |
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| CalumD23 Member Since: 30 Aug 2021 Location: Surrey Posts: 37 
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Thank you for the detail, I’ll get stuck into that today - much appreciated. No whooshing noise that I’ve noticed but I’ll take it for a spin later and see if I can hear anything now I’m looking for it.
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21st Feb 2022 10:30am |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1997
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If the intercooler is split you can hear the whoosh when stationary, wind down the window, rev up engine and you will hear it.
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23rd Feb 2022 9:51pm |
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| CalumD23 Member Since: 30 Aug 2021 Location: Surrey Posts: 37
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Ian - thanks. No obvious whine as far as I can tell so I think I can rule out the intercooler.
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1st Mar 2022 1:44am |
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| CalumD23 Member Since: 30 Aug 2021 Location: Surrey Posts: 37
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Sorry - should say whoosh not whine
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1st Mar 2022 1:54am |
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| Pipmac Member Since: 01 Mar 2014 Location: Knutsford Posts: 23 
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I used to get this regularly and tried everything with the garage to fix it.
However doing just one simple thing is what eradicated it (so far - forever) When you turn the ignition key, wait until the glow plug lamp (curly icon) goes out before you actually turn the key that last part to start. I have no technical knowledge about why it works but it does for me. Try it, it’ll cost you nothing. Best Pip |
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4th Mar 2022 7:27pm |
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| Wilderness Woodsman Member Since: 06 Mar 2022 Location: Wales Posts: 19 
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I appreciate the error code points towards the MAF sensor, but I highly recommend removing the MAP (manifold absolute pressure) sensor and cleaning this too.
From previous experience with LR error codes & restricted performance, a dirty MAP has been the culprit. Super simple to remove and clean, so worth the 5 minute investment in time. |
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9th Mar 2022 8:47am |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1997
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^^^^^^^^^
https://www.defender2.net/forum/topic69503.html?highlight=maf Worth a read on MAP, MAF and air charge sensors. Easy to remove and clean |
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9th Mar 2022 11:37am |
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| cold Member Since: 15 Dec 2018 Location: Yorkshire Posts: 118 |
Calum - did you manage to resolve?
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16th May 2022 3:11pm |
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| CalumD23 Member Since: 30 Aug 2021 Location: Surrey Posts: 37
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Apologies for the late reply. I have actually fixed this - I had a look for cracks in the air intake and it turned out the air box was cracked and had been glued back together very shoddily. I did a quick repair to tide me over with some airtight tape (gorilla tape I believe) and that’s fixed the problem. Replacement air box coming from eBay soon so just need to fit it - easier said than done as it’s an incredibly tight squeeze to get it in but at least it’ll be fixed.
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6th Oct 2022 1:48pm |
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