Member Since: 09 Oct 2008
Location: Bristol
Posts: 649
Fault code Help 02A7, P02AA and P121A
HI read my fault codes yesterday to find these:
P02A7, P02AA and P121A
Cylinder 4&5 fuel trim minimum
I also have an issue with cold starting and relatively lumpy - had glow plugs changed last year and it is not the battery.
Are these an indicator to injectors ? or the HPFP?
Many thanks
1st Mar 2014 6:27 pm
cornishboy
Member Since: 09 Oct 2008
Location: Bristol
Posts: 649
Anyone have an opinion?
It depends if I can claim on warranty as HPFP is covered but injectors are not?
If injectors are these easy to replace or expensive?
2nd Mar 2014 7:44 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Probably injectors so consider a spill / balance check before spending money on new ones. Don't presume the fault is with those that trigger the code, look at them all (NB 5 is at the max limit).
Sorry about the warranty thing.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20733
I suspect injectors
As Robbie says, check ALL of the injectors. One may be near its max limit, causing the other injector to drop to its min limit.
If you have them removed, and sent to a specialist, have them strip the injectors, to check the nozzles. Been caught out with that before My D3 Build Thread
Member Since: 23 Oct 2011
Location: Isle of Skye
Posts: 124
Agree with Robbie about the spill check; would definitely do that, as it would also allow you to confirm that the spill rail is not part of the cause. Strange to have that combination of cylinders all the same. Normally you would expect 1 and 6 to be the first to play-up (opposite corners of the engine with fuel rail issues)
3rd Mar 2014 1:17 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Just thinking that none of us have mentioned the obvious stuff, but just in case can you please confirm you have looked around the injectors for any sign of a small fuel leak?
When it comes to numbering there can also be confusion with code readers, live values and injectors. The ECM actually lists the injectors as 0 to 5, with 0=cylinder 1 and 5=cylinder 6. Cylinders 1 to 3 are also known as Bank A with 4 to 6 as Bank B. To keep a common format and to make it easier to understand some code readers list the injectors as 1 to 6.
Others list by firing order (1 - 4 - 2 - 5 - 3 - 6) which, for a RHD vehicle can make it:
- Driver’s side front cylinder, cylinder 1, injector 1
- Driver's side centre cylinder, cylinder 2, injector 3
- Driver's side rear cylinder, cylinder 3, injector 5
- Passenger side front cylinder, cylinder 4, injector 2
- Passenger side centre cylinder, cylinder 5, injector 4
- Passenger side rear cylinder, cylinder 6, injector 6
The big arrow faces the direction of forward travel:
This has confused the heck out of me at times, but then my brain is very small.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 09 Oct 2008
Location: Bristol
Posts: 649
Thanks for all the replies!
I had a good look around today and there are no visible leaks from the injectors - they look complicated if they need to be changed?
I DID SEE A FEW DEAD SPIDERS.........
My next questions are
1) How does this lumpy only happen when cold - it runs like a dream when warm/hot no lack of performance. Surely if 1 or 2 injectors have gone it would be rough all the time?
2) What do injectors cost and how hard are they to replace?
3) What are the symptoms of a HPFP failure or reduced pressure from these?
Think its time to get it in to LR Stealers and pay for them to diagnose which injectors have gone!!!
I bow to your knowledge
3rd Mar 2014 7:28 pm
will247
Member Since: 05 Jan 2013
Location: York
Posts: 709
Welcome to my boat, I've fixed the lumpy start up by using a remote for the FBH. I'm considering replacing all the injectors.... Only thing stopping me is that may not actually fix it and it still may need a HPFP.
Injectors are about £200.00 each.
HPFP about £600.00
All pretty eye watering. I've done 15k since I bought it and it has always done it and nothing seems to be getting worse!
My story so far http://www.disco3.co.uk/forum/topic101568.html26 and on the 4th LR..
Series 2a 1963 88'' 2.25 Derv as original with Galv chassis
Disco 1 1996 V8 on LPG (sold now)
Disco 3 2005 TDV6 S (sold now)
Disco 4 MY15 XS Commercial
3rd Mar 2014 7:42 pm
cornishboy
Member Since: 09 Oct 2008
Location: Bristol
Posts: 649
Will,
Many thanks for this nugget........maybe an expensive game.
What would the diagnosis cost be (spill test and HPFP pressure test)? I really hope its the HPFP as that i covered by warranty.....
Steve Norman - where are you based? PM me if you can give me a cost for diagnosis?
Cheers
3rd Mar 2014 8:52 pm
Woolmeister
Member Since: 26 Mar 2007
Location: Chandler's Ford
Posts: 3457
What was the resolution to this problem please, Cornishboy?
Thanks,
Steve2021 BMW iX3 Premier Edition in Carbon Black ⚡️🔌
2019 Škoda Kodiaq 2.0 Tdi 190 DSG Sportline in Quartz Grey. Excellent vehicle. Gone.
2017 Discovery Sport HSE Auto in Carpathian Grey and Ebony Leather. Modern JLR Junk. Gone.
2007 Discovery 3 TDV6 S Manual in Zermatt Silver with Ebony Cloth (143k) Gone, but now patrolling the Asia section of the West Midlands Safari Park!
29th Sep 2015 6:36 am
cornishboy
Member Since: 09 Oct 2008
Location: Bristol
Posts: 649
Hi Steve,
Yeah the results:
1 - Spill Test revealed one injector over compensating for two others and giving max trim
2 - Replace 2 x Injectors
3 - Re-check
4 - Refurb two old injectors ready for more to go wrong
I hope that helps.
29th Sep 2015 10:15 am
cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
Thanks for this thread seems I have the same issue and symptoms!
Just no tools to do myself so guess it’s an Indy bill 😟Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales
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