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chris.jones

Member Since: 20 Dec 2013
Location: Santiago
Posts: 2

2009 Defender 90 Puma 2.4 SW Stornoway Grey

Help - Issue when going 90km/hr

Hi All,
First time writing on this forum.
I'm having issued with my Defender Puma 90 2.4L. It has 200K on the clock, and never gave me any major issues (except for a blown up front diff and new clutch kit).
The thing is that now when going around 90km/hr, I can't go any faster. It's like the engine lost all its power and the turbo won't activate.
This happens randomly. After a few minutes driving will disappear or after an hour of driving could start happening.
I've been having this issue for a couple o months, but this morning the Check engine light when on, when it was happening.
I just went to my local mechanic for a scan, and two code errors showed up:
1.- P1103: Mass air flow sensor in range but higher then expected.
2.- P0234: Turbo/supercharge overboost condition.

At the begging my though was that maybe something was obstructing the airflow into the engine, by the error codes show otherwise.
Any ideas what could be happening? Maybe the MAF sensor misgiving off readings and messing up de turbo activation?
Any other suggestions?

Please your help.
Thanks a lot,
Chris

20th Jul 2018 4:30pm

v8bobber

Member Since: 26 Aug 2012
Location: pembrokeshire
Posts: 444

2008 Defender 110 Puma 2.4 DCPU Java Black

Have you checked the turbo. Sounds like the actuator could not be working properly.

I had a similar problem and found the vanes were sticking when it was hot. It tended to happen when it was hot. A switch off and restart would usually fix it

20th Jul 2018 4:41pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17338

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Also check the wiring harness to the turbo for chafing damage all the way from ECM to turbo.

20th Jul 2018 4:55pm

VeeTee

Member Since: 06 Mar 2011
Location: Somewhere
Posts: 1512

There was a Land Rover Technical Service Bulletin adressing the P0234 Turbo overboost condition:

https://forum.lrch.nl/download/file.php?id=5277

About the P1103 error code:
Check the air inlet system for leaks or blockage. Check MAF sensor or replace the sensor if needed.
Clear fault codes and check if all is good now. Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold)
1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold)
1975 Series III 88 V6, Light Green (sadly sold)
1996 Defender 110 CSW 300 Tdi, Epsom Green (sold)
2000 Freelander 1 TD4 3-drs, Silver (sold)
2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold)

MySite

20th Jul 2018 5:25pm

chris.jones

Member Since: 20 Dec 2013
Location: Santiago
Posts: 2

Thanks for all responses.
I changed the MAF sensor and clear the codes.
Drove this afternoon and worked fine. Also before doing the changeI realized that some smoke was coming out of the exhaust, and after changing the MAF sensor the smoke was also gone.
I believe all was caused by a malfunctioning MAF sensor, causing the turbo to go crazy and bad combustion in the engine.

20th Jul 2018 10:40pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20294

You can clean the MAP and MAF sensors, if you've changed the MAF I'd recommend you clean the MAP.

⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

20th Jul 2018 11:34pm

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