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benh78

Member Since: 29 May 2018
Location: UK
Posts: 15

2015 Defender 110 Puma 2.2 USW Santorini Black

2.2 Puma Limp Home Mode

Hi All

Currently in France travelling from the UK. Had a bit of nightmare journey in the Defender kept going into limp home mode with check engine light on. Did it the day before and my local indie had a quick look and it was showing some MAF faults - I didn't get the codes and couldn't get a spare MAF to take with me but it was intermittent so rolled the dice - not such a good idea with a Land Rover

. If I turn the engine off and back on it runs normally for a minute and then drops into limp home mode. Eventually discovered if I keep the revs above 3000 rpm it runs normally for hours.
Pulled the MAF and MAP sensors cleaned with brake cleaner no real change. But pulled the air change temp sensor intercooler on the intercooler pipe - green sensor on the intercooler pipe - it was covered in a thin coating of oil - so cleaned it - check engine light goes out car ran normally for 15 mins at any revs and then check engine light came back on back into limp home. Pulled the air change temp sensor intercooler cleaned it again check engine light went off. Spoke to a couple of garages in the UK some oil in the intercooler pipes is normal apparently so wonder if this sensor is giving a false temp reading and the engine goes into limp home. Engine hasn't used any oil on the 500 mile journey. So was going to try and get this sensor and a MAF sent out to me in France for the return journey. Has anyone else had this issue? Don't think it's a split hose engine sounds normal and I wouldn't expect to get any boost with split hoses, air cleaner is about 1000 miles old and looks in good condition, air box is correctly closed up.

Thanks

Ben

29th May 2018 10:12am

Sockpuppet

Member Since: 17 Sep 2011
Location: Leicester
Posts: 479

Where about are you?

Id suggest getting the codes read to find out what it's unhappy about. You could be chasing a red herring with the old MAF faults that were logged.

29th May 2018 11:53am

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

MAF faults aren't necessarily caused by the MAF either, an EGR valve playing up can also trigger spurious faults.

29th May 2018 12:36pm

Siwynne

Member Since: 04 Nov 2016
Location: West lancs
Posts: 578

Check all intercooler hoses for tighteness and leaks these leaks show up as a maf map pressure difference.
Listen for a slight hissing under load as an indicator.
A little soapy water around pipe joints can help find a leak.

29th May 2018 1:04pm

Siwynne

Member Since: 04 Nov 2016
Location: West lancs
Posts: 578

Do the intercooler too. Mine split and didn’t hiss but allowed enough out to trigger maf codes randomly

29th May 2018 1:06pm

benh78

Member Since: 29 May 2018
Location: UK
Posts: 15

Thanks I’ll check for leaks I’ve also got a maf and charge air temp sensor coming just in case it’s one of those.

29th May 2018 3:00pm

Siwynne

Member Since: 04 Nov 2016
Location: West lancs
Posts: 578

Where in France are you
Anywhere near the limousin region?

If you are and get stuck I have a basic gaff with beds and shower that is available.

Good luck getting sorted.

29th May 2018 3:50pm

benh78

Member Since: 29 May 2018
Location: UK
Posts: 15

We made it to our campsite in trinite sur mer in Brittany all ok just keeping the revs above 3000 but thank you for the kind offer.

29th May 2018 4:25pm

Julie

Member Since: 07 Oct 2017
Location: Nantes
Posts: 484

2012 Defender 110 Puma 2.2 SW Keswick Green

Re: 2.2 Puma Limp Home Mode

benh78 wrote:
currently in France travelling from the UK. Had a bit of nightmare journey in the Defender kept going into limp home mode with check engine light on.

Hi there - if it's a 2.2 take a quick look if the DPF sensors set loose. Bonne chance!

29th May 2018 9:25pm

benh78

Member Since: 29 May 2018
Location: UK
Posts: 15

Hi All

It got us back from France all ok and it turned out to be a split in the intercooler near one of the ends it was repaired under the extended warranty. Ideally I’d like to upgrade the intercooler and hoses but there is prob no point while under warranty as the dealer only uses genuine parts. I would really like to add a third party cruise control but I don’t know if that would invalidate the warranty.

17th Jun 2018 7:59am

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