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mata

Member Since: 24 Jan 2014
Location: Manchester
Posts: 153

2009 Defender 110 Puma 2.4 USW Stornoway Grey

EML light 1103 MAF sensor

Hi there, I’ve been seeing how this issue goes, hoping it might go away but it hasn’t.

I’ve replaced MAP and MAF sensors this past year trying to resolve an underboost fault which ended up being sticking turbo veins, ultimately resolved by replacing the turbo.

Before the turbo issue I’d always had a MAF fault stored in the list but it never used to illuminate the EML but i now have a reoccurring EML for this fault only.

The MAF was replaced in summer with a brand new genuine one from Landrover. The vehicle has a superchips remap, superchips supplied K&N panel filter and a blanking plate with small hole over the EGR (which was also replaced 1 to 2 years ago with a genuine Landrover unit.

Other than putting the car back to standard and seeing how I go, which isn’t all that appealing, is there any process I can follow to try and establish why the 1103 fault code is now illuminating my EML?

Thanks in advance for you thoughts , Mat.

21st Dec 2018 5:51pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20328

It may well be the EGR causing the MAF faults as the two go hand in hand.
Is the EGR fully active or shut and fully blanked? ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

21st Dec 2018 6:15pm

mata

Member Since: 24 Jan 2014
Location: Manchester
Posts: 153

The EGR is fully active but with a blanking plate with small hole. Should t be too hard to take the plate out and see how things go. Thanks for the suggestion.

21st Dec 2018 6:34pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20328

That may well be your issues, years ago many tried it with that method. Some had no issues, some had immodate issues and others the EML occasionally.
Mine is deleted and blanked completely, prior to that with active EGR I had no end of issues.

The EGR can throw out MAF readings hence metering of airflow May throw a DTC.

These are possibilities at least.

Good luck.👍🏻 ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

21st Dec 2018 7:19pm

mata

Member Since: 24 Jan 2014
Location: Manchester
Posts: 153

Thanks again, I’ll give t a go, I thought fitting a brand new genuine egr with the blank with hole might be a lasting solution but I was forgetting I was working on a Defender!

23rd Dec 2018 7:38pm

expatRob

Member Since: 24 Feb 2015
Location: Frankfurt
Posts: 58

2007 Defender 110 Puma 2.4 SW Tonga Green

1103 nightmare

I too am battling the 1103 fault nightmare.

I have the standard map, no tuning.

I have a new OEM MAF sensor, I have a NEW EGR (no blank or small hole blank - i used too but had it removed when the new EGR went in.) My EML will stay off for a few days and then it will light up again. I don't know what to do.

I also have the under-boost problem. I'm sure it is also the Turbo Veins sticking. Is there anything worth doing to fix this or is a new Turbo the only option.

Thanks
Rob

3rd Jan 2019 2:52pm

mata

Member Since: 24 Jan 2014
Location: Manchester
Posts: 153

Regarding turbo veins, take the actuator arm off the actuator by removing the (easy to lose) circlip. Move the arm up and down and feel for any sticking. Mine was sticking at the top (versus gravity) end, it took a lot of force to get it moving again. Ive more information in another thread somewhere, have a look for it.

I believe you can get your turbo repaired - they replace the vein mechanism but given min ehad done 140K miles i felt it prudent to replace the whole unit with a recon one.

3rd Jan 2019 3:03pm

expatRob

Member Since: 24 Feb 2015
Location: Frankfurt
Posts: 58

Thanks I will take a look at the Actuator arm.

When I am driving on the highway at speed and the then the engine loses power and the 6th is worthless, I pull to a stop, turn off the engine and then turn back on. It fixes the problem. Obviously I can't just do this all the time, I need to find out what to do.

3rd Jan 2019 3:24pm

mata

Member Since: 24 Jan 2014
Location: Manchester
Posts: 153

This was my symptom also, it got progressively worse over a few months.

3rd Jan 2019 7:08pm

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