Check engine light

Hi Guys.

I have a 2005 TD4 SE. I recently took the inlet manifold off, intercooler out, pipes off, hoses off etc and degunked it all and fitted a Egr delete in place, plus Changed all vacuum hoses to the turbo boost solenoid to silicone.
Now have her back together and running again, I tried her on a short drive and got a check engine light come on, but not instantly only when I started and restarted her once I got home.

When I put my OB2 reader on I got two codes P0237 and P0047.
These are codes for the intake pressure sensor input circuit being low indicating a short to ground or something like this.

I have cleaned all these sensors out while doing the whole intake system but maybe I have one of the sensors down.

This one being a 2005 model has the extra sensor in the outlet from the intercooler to the inlet manifold measuring the temp so doubt its that one as it doesn't read pressure it must be the sensor which reads both temp and pressure on the inlet manifold which is at fault!
Don't know if anybody has had this issue and can give me any points incase it's something silly.
Will check over all the wiring again incase of any broken connections etc.

I have got the Mrs to rev her while I squeeze on one of the turbo hoses and it goes hard so plenty of boost there.
Any help would be appreciated.

Thanks.
Ross.

Hi Ross.
When you cleaned the inlet manifold how did you clean the MAP sensor ? was it removed from the manifold when you cleaned that.

Also are the hoses secure on the turbo boost solenoid, and the EGR solenoid, try removing the bypass EGR and adding the original EGR back to see if that changes anything for you, if so then just clean the original EGR out

Hi Artic 2.

Thanks for the reply.
Yes mate completely removed it all and cleaned it out. Thing is it never had any fault codes before i did this! How the map sensor ever read any pressure before I don't know it was choked Solid in there.

I changed all the breather system to the vortex one and fitted a new turbo breather filter also.
The turbo filter has a flow direction on it but I guess that's mainly for if you use it for a fuel filter for best filtration as it blows through both directions. I had thought maybe its around the wrong way but can't be a issue, I have put the flow going to the turbo is that correct?

Plus I moved my filter to near the power steering resovoir so I can change it easy and check how clean it is, can't see this causing a issue either?

Thinking of pulling out my map sensor again just incase something has came adrift on it and clogged it. I think you can remove the map without removing the inlet manifold well I hope as it's just a pain.

Thanks again for any help.
Ross.

ross brown said:

Yes mate completely removed it all and cleaned it out.

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How did you clean it? They're very delicate and easily damaged by incorrect cleaning procedures.

Just used brake cleaner for the map sensor but the whole manifold I submerged it in a carbon cleaner.

Will try get it out again later and check it again.

Cheers.

Thought maybe the boost solenoid but think it's sensor related to be honest.

Cheers.

Ross Brown

Hi Guys.

Just a quick update. I plugged my scan gauge 2 into the obd2 port today. Got the same fault code as usual P0047, Which does clear for a while.

Anyway when I went onto the gauges menu looked at the Map sensor psi and its reading 0psi!! This is on tick over. So cleared the fault again and Took her up the road with it plugged in and the Map sensor all of a sudden started reading boost but was a little erratic, flat out at about 45ish it was reading 28.7 psi and then it seemed to work fine through out the little short run. On tick over it was reading 14.4psi.
So I turned her off and restarted her, straight away the check engine light Came straight back on again. So I went into the gauges menu and the map sensor was reading 0psi again.
Cleared the fault and it starting reading boost psi but erratically jumping up and down.
So it's obvious I have a issue with the map. Will have it out tomorrow at some point but suppose the whole intake manifold has to come off again!!! Stupid idea if it does, seems not alot of room to remove it in position!

Maybe there is some gunk which has came loose since my intake clean and blocked it up, but still can't see how she ran OK with it totally blocked before!!

Oh well least I have a idea now. Is it best to buy genuine landrover map sensors or is there decent ones from other places.

Cheers.

Ross.

ross brown said:

Just used brake cleaner for the map sensor but the whole manifold I submerged it in a carbon cleaner.

Will try get it out again later and check it again.

Cheers.

Thought maybe the boost solenoid but think it's sensor related to be honest.

Cheers.

Ross Brown

Click to expand...

Hi Ross.
From reading above it does seem like the MAP as been damaged, did any brake cleaner get inside the hole of the map sensor if so then that as most likely caused the problem, all they need to clean them is a rag with a spurt of carb cleaner on the rag then wipe clean the sensor, never poke anything into it, not that I am saying you have mind.

Below are a few photos of what the MAP sensor looks like inside.

Hi Artic2.

Good morning.
Definitely is map related, to be honest when I first plugged my scan gauge 2 into it I did check the gauge menu and I looked at the Map and it showed 0psi but thought maybe the scan gauge 2 didn't read it as its not a proper tester but when it started reading it erratically I knew then it's Map related.

I used brake cleaner to clean it out, didn't poke anything down the hole but did spray it down the hole as it was clogged up solid but suppose I may of done more harm then good, dam it!!!

Will take it all out including the inlet manifold today as I can't see it being possible doing it in position.

What's the best option for sensors? Genuine, bosch etc?

Cheers for the help guys.

Ross.

ross brown said:

Hi Artic2.

Good morning.
Definitely is map related, to be honest when I first plugged my scan gauge 2 into it I did check the gauge menu and I looked at the Map and it showed 0psi but thought maybe the scan gauge 2 didn't read it as its not a proper tester but when it started reading it erratically I knew then it's Map related.

I used brake cleaner to clean it out, didn't poke anything down the hole but did spray it down the hole as it was clogged up solid but suppose I may of done more harm then good, dam it!!!

Will take it all out including the inlet manifold today as I can't see it being possible doing it in position.

What's the best option for sensors? Genuine, bosch etc?

Cheers for the help guys.

Ross.

Click to expand...

Hi Ross.
Remove it and see if you can shake any brake cleaner out of it, I would think it would have evaporated by now though, if you can find a scrap yard open get one off a Rover 75 diesel they are the same manifold, you can just about remove the MAP sensor with out removing the manifold but it is a struggle, I made a socket up using an Allen key and a 10mm shallow socket.

Ok so I have looked through the files no photo, so went out took photo the best I could with out removing the engine cover etc, pic below.
1

I am glad I did now because I also found this a split in the intercooler pipe which will be changed today.
2

Wrong Freelander but have left in place so the thread makes sense

That was lucky you spotting that intercooler hose split, least you can sort that hey.

Yea it's pretty tight the map sensor mine has a m6 10mm head on mine but same thing really. They have all that inlet manifold area and they put it there it's crazy!! Must admit it's a pain to work on the TD4 compared to my 1990 tdi disco and 2004 TD5 disco.
Ahh OK that's good a rover 75 one maybe cheaper too, thank you. Will have a go at it today at some point.

Cheers.

Ross.

ross brown said:

That was lucky you spotting that intercooler hose split, least you can sort that hey.

Yea it's pretty tight the map sensor mine has a m6 10mm head on mine but same thing really. They have all that inlet manifold area and they put it there it's crazy!! Must admit it's a pain to work on the TD4 compared to my 1990 tdi disco and 2004 TD5 disco.
Ahh OK that's good a rover 75 one maybe cheaper too, thank you. Will have a go at it today at some point.

Cheers.

Ross.

Click to expand...

Hi Ross
I do apologise I seemed to have got mixed up and took the photo's of my FL2 as I was also answering another post on here too.

1

2

It is possible to remove but very hard, and by the time you have fiddled about you would have had the manifold off.
3

Some can be solid with gunk.
4

Carb cleaner on a rag wipe over and they should be ok.
5

No worries mate. Appreciate all the help, can imagine you have loads of posts to reply too. To be honest I wondered why it had a different bolt.

Yea I think I will just remove it all again must easier to work on and my luck I would end up dropping the bolt!!!

Not only that I can checkother things too how clean the inlet manifold is after my clean out etc.

Didn't get a chance to work on her today hopefully Saturday or Sunday all being well.

I will try cleaning it out first I think worth a try but I found this map sensor on ebay and it seems good quality being a Lemark Part.
What do you think? I reckon genuine landrover will be plus £90.

https://www.ebay.co.uk/itm/402217809132

Cheers.

Ross

ross brown said:

No worries mate. Appreciate all the help, can imagine you have loads of posts to reply too. To be honest I wondered why it had a different bolt.

Yea I think I will just remove it all again must easier to work on and my luck I would end up dropping the bolt!!!

Not only that I can checkother things too how clean the inlet manifold is after my clean out etc.

Didn't get a chance to work on her today hopefully Saturday or Sunday all being well.

I will try cleaning it out first I think worth a try but I found this map sensor on ebay and it seems good quality being a Lemark Part.
What do you think? I reckon genuine landrover will be plus £90.

https://www.ebay.co.uk/itm/402217809132

Cheers.

Ross

Click to expand...

Hi Ross
Here are a couple of links for you. any would do I usually have a couple spare but all are on the manifolds at the moment sorry.
https://www.island-4x4.co.uk/sensor-20012006-britpart-mhk101060l-p-24248.html

https://www.johncraddockltd.co.uk/mhk101060l-sensor-multi-point-injection-manifold-pressure.html

https://www.ebay.co.uk/itm/SENSOR-M...579-5850801-MHK101060L-BMW-OPEL-/202538159393

https://www.motor-doctor.co.uk/products/7754336-sensor-boost-pressure

Thank you again for this really appreciate your help guys.

Ross.

The Brit part one seems the cheapest, would you say that would would be OK quality.

Just some people have bad opinions about Brit part that's all.

Cheers.

Ross.

ross brown said:

The Brit part one seems the cheapest, would you say that would would be OK quality.

Just some people have bad opinions about Brit part that's all.

Cheers.

Ross.

Click to expand...

Hi Ross.
In this instance I would say it would be ok to go with the brit part & any of the others even your own link, as by the time the vat & postage as been added to some of them they are on average about the same price, £36 -£40 the part very rarely goes wrong, in fact I don't think I have ever seen one except yours, they all have warranty anyways don't forget to try and fit your original EGR wiped out clean Swarfega and an old tooth brush are good to clean them out, before you go purchasing anything cheers Arctic.

PS Ross I just had a thought is the car driving ok no misses etc, did you check the wiring to the turbo boost sensor inline with the intercooler hose pic below also spray some switch cleaner onto the connection push it on & off a few times see what happens, I am not truly convinced its the MAP sensor, check all vacuum hose coming from the EGR solenoid as they can chaff with a small hole sometime, worth going over your work I think, seeing as we are all in lock down

Yea as you say I can't really go wrong as they are all pretty much the same price.

She has done 134k and I've only had her 6months or so and she has been off the road for Most of it as I've been doing all little jobs on her. As I said I fitted a new egr delete pipe and all the inlet manifold I cleaned out.
I removed every electrical connection on the engine while I could get to everything and I put thin lube on the contacts and checked all the wiring.
Plus as I said earlier I changed all the vacuum hoses to silicone as they had all had it.
I done the modification on the breather and put the vortex one on which has stopped the smoking and rough running when she was first started. Plus Changed the little turbo filter, which I moved over to near the power steering resovoir for easy checking and changing.

Will add photos of this shortly. I am hoping to have a go on her this afternoon so will keep you posted if I do.

Thanks again.

Ross Brown.

Just a few pictures of the old girl. I will upgrade all the intercooler and turbo hoses to blue silicone hoses plus new stainless steel clamps soon.

You can see where I moved my turbo filter next to the power steering resovoir.







Cheers.

Ross Brown.

Nice one of the cleanest engine bays I have seen in a long time, you have put some time into that hope you get it sorted asap, I gut the original EGR for a bypass as below.