 | Home > Puma (Tdci) > MAF issue with a '09 2.4ltr Defender Puma 110 wgn... |
 
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6641   
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Dead MAF in my opinion, or faulty connector/loom.
Signal coming back from it to the ECU isn't in spec so either the MAF has packed up or the connection between the MAF and the ECU is damaged.  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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26th Apr 2019 8:49am |
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| X4SKP Member Since: 29 Nov 2013 Location: Berkshire Posts: 2298 
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Hello RobM
I've owned my Puma 2.4 (MY2011) for 5 years now and once a year (approximately) I get the MIL (Engine Light) staring back at me... Not your code P0100 but P1103 (both Fuel and Air Metering / MAF identified)
So Bought a Scangauge… Click image to enlarge Obtained the Fault Codes... P1103 Click image to enlarge P0100 Click image to enlarge Normally after 4-6 engine cycles (Starting and Stopping) it goes away... Then it didn't...
Thought about buying a new Sensor... 
MHK501040 Genuine LR OEM £142.35 + VAT £170.82 (UK) Claimed OEM (Interweb) £69.45 (Inc VAT) Decided to buy some MAF Cleaner (rather than just use a low pressure air line) so far so good 6 months no MIL (I also change my Air Filter every 6 Months) Was also told by trusted LR independent...always check the two bulk head Earthing Points (take apart clean each terminating eye washer and re-assemble) Click image to enlarge Click image to enlarge Click image to enlarge I gave the Sensor a good clean...as instructed...twice and I'm hopful I get some reliable use from it, if it fails again I'll get the LR OEM replacement... (I can usually get 10-15% discount being a 'repeat offender' at the parts counter... )
Maybe worth a try to clean it (unless you have already) Good Luck... SKIP https://www.defender2.net/forum/topic83242.html Last edited by X4SKP on 26th Apr 2019 9:31am. Edited 1 time in total |
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26th Apr 2019 9:13am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 55  
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Hope that's all it is and that it can be quickly solved as the time is fast approaching when we head off into the Desert... which by the way is currently closed due to flooding.... go figure 
Martin, what about the other 2 Not Tested ones? Are these old ones that are no longer current? Cheers..... Rob 1995 Defender Tdi 110Wgn 2010 Defender PUMA 110Wgn TRIPS: Meanderingdownunder WikiLoc Trips |
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26th Apr 2019 9:30am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 55
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Thanks for the reply... When u say that it cleared itself after 5-6 starting / stopping - do u mean u had to reset it everytime until it cleared or did it just clear on its own? Don't reckon I could be that lucky & have that work for me... Cheers..... Rob 1995 Defender Tdi 110Wgn 2010 Defender PUMA 110Wgn TRIPS: Meanderingdownunder WikiLoc Trips |
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26th Apr 2019 9:34am |
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| X4SKP Member Since: 29 Nov 2013 Location: Berkshire Posts: 2298
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Hello RobM
For me the P01103 Fault Code has self cleared every time but one, after around 6 engine cycles... I was set to replace the MAF Sensor but tried Cleaning it...which appears to have worked... again the MIL then self cleared after a few more starting cycles. Click image to enlarge Actually with my Scangauge if you try to CLEAR the P01103 Fault Code you get a 'NO RESPONCE' notice. SKIP https://www.defender2.net/forum/topic83242.html |
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26th Apr 2019 9:50am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 55
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yeah, I had the result when trying to clear the P0100 code, but I found if I turned off the engine, then back on to accessories position only, then the SGII would clear it... not sure about the P01103 code though as I haven't had that one... I'm assuming this P0100 (& possibly the one u mentioned above P01103) will still allow your vehicle to function/drive normally? rob Cheers..... Rob 1995 Defender Tdi 110Wgn 2010 Defender PUMA 110Wgn TRIPS: Meanderingdownunder WikiLoc Trips |
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26th Apr 2019 10:04am |
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| X4SKP Member Since: 29 Nov 2013 Location: Berkshire Posts: 2298
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Hello RobM
Interesting (well for us anyway...  ) I'll try that, if it happens again. Don't remember exactly what I did,
but thinking about it I don't think I would have had the engine running when trying to clear the code... so maybe I was in the condition you say worked for you. Another piece of advice I had from the Indy' was to disconnect the battery and bring together the + and - cables...at first thought this just feels wrong but the Battery is completely out of the equation...they do this for LR vehicles coming in with a MIL lit up after first plugging in the various diagnostic equipment they have, sourcing (rectifying the problem), checking the earthing points...this battery connection cable 'trick' (apparently) can jump you to the clearing of a MIL Good Luck...  SKIP
https://www.defender2.net/forum/topic83242.html |
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26th Apr 2019 10:23am |
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| X4SKP Member Since: 29 Nov 2013 Location: Berkshire Posts: 2298
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Hello RobM
How's yours performing now? Have you fitted a new LR or OEM MAF Sensor? Do you have a more 'developed' idea as to what was causing your P0100 Fault Code? You may be able to guess at this point why I'm asking / interested...
My 6 months between...
is up... 
But this time,... for the first time, I get 'your' code Click image to enlarge I also see on my SGII the previous MAF code 'logged' Click image to enlarge I tried to clear these codes (having photographed them) and for me on this occasion trying to do this with the engine running the SGII returns NO RESPONSE Trying the Second Stage of the ignition (accessories) as you suggest, whilst the SGII take a few seconds to come to life, it did then clear both codes without issue. Now I know this is / can be setting up a Defender owner to think all is now ok when it may not be. So any insight into (for you) what the problem is i'd be interested to here. MY 2.4 tdci 90 has the original MAF Sensor fitted, 45K mileage, a new OEM Air filter every 6K, when the Engine light come on there is absolutely no perceived difference in engine performance, or fuel 'economy'. Thanks... SKIP https://www.defender2.net/forum/topic83242.html |
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28th May 2019 1:19pm |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 55
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Well... There's a bit of a story to my issue, which I hope and pray is now fixed..
I ended up booking the car into an independent LR mechanic to get it solved once and for all. Gave the vehicle to them for 2days & from there the vehicle was to go around to a smash repairs to have the corrosion around the alpine windows fixed. When I dropped off the car the MAF was not working all. Anyhow, a few hours later I received a call that it was just a faulty MAF sensor and they fitted a new one (Intemode brand one I believe which I could have bought myself and got it about 50% cheaper). I told them - cool and that the smash repair fella will come around and pick it up. 2 days later I went to pick the vehicle up from the smash repairer and soon as I started the engine - the Engine Check Light was back on AGAIN - Same code too. Not a happy fella I headed straight back to the mechanics where they put their diagnostic tool on and it at first indicated that the MAF was working fine, but then all of a sudden it stopped working. He then gave some alternative reasons which were not good (possible wiring harness issue/issue with ECU). I said to the mechanic how about I pop the bonnet and wiggle some wires/connections to see what the go is... Upon lifting the bonnet and upon closer inspection of the MAF Plug, u could see some exposed copper from the wires, etc. Soon as the mechanic saw that he said it would be the plug. 2 hours of waiting the mechanic came out and said that moisture had gotten down inside the plug where the cable goes in and joins with the pins started corroding resulting in poor connection... The size of the wires to the MAF plug are very small and just weren't sealing and keeping out the moisture properly. The problem also is that apparently these plugs/pins are not a seperately sellable item so the mechanics had to source a solution and then graft this NEW plug and thicker wires into the harness AND ALL IS GOOD SO FAR... Sorry... bit of a long story... I could just have said - Check the MAF Plug for internal corrsion to the pins/wires  Cheers.....
Rob 1995 Defender Tdi 110Wgn 2010 Defender PUMA 110Wgn TRIPS: Meanderingdownunder WikiLoc Trips |
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28th May 2019 10:01pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6641
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Glad you got it sorted, I did say it might be a loom issue
Not that it helps you now, but if others are in the same situation I supply the MAF plugs: https://www.defender2.net/shop/defender-pu...s-p98.html 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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29th May 2019 7:24am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 55
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Yes, thanks Martin...
Would be nice to find out where you can buy these Pins/Plugs just in case something like this happens again... Cheers..... Rob 1995 Defender Tdi 110Wgn 2010 Defender PUMA 110Wgn TRIPS: Meanderingdownunder WikiLoc Trips |
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29th May 2019 8:02am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6641
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You can buy them from the site shop, link in my post
1988 90 Td5 NAS soft top
2015 D90 XS SW |
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29th May 2019 8:08am |
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| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 55
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Oops... Sorry Martin,
I should have spent more time in reading your post instead of glossing over it.... sorry mate 
I assume u just splice that plug into the wiring loom? Is the cable well sealed to prevent water ingress...? Cheers..... Rob 1995 Defender Tdi 110Wgn 2010 Defender PUMA 110Wgn TRIPS: Meanderingdownunder WikiLoc Trips Last edited by RobM on 29th May 2019 9:40am. Edited 1 time in total |
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29th May 2019 9:25am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6641
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No worries
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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29th May 2019 9:30am |
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| X4SKP Member Since: 29 Nov 2013 Location: Berkshire Posts: 2298
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Good to hear you have a fix RobM
Hope you kept the swapped out MAF Sensor as it looks possible it was not at fault. I'll be taking a very close look at mine now...and if needed Martin looks to have plugged this weakness (sorry ) SKIP
https://www.defender2.net/forum/topic83242.html |
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29th May 2019 1:43pm |
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