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P38 Keys and Key fobs

68K views 42 replies 23 participants last post by  mark H 2315  
#1 ·
Most seasoned RR owners will already have this information, but for newbies like me, the following appears to be 'just the way it is'!! Like a lot of folks I bought my Rangie with only one working key/keyfob and no EKA [didnt even know it had one of those!].

Whilst what follows may not be a definative work on the subject of the P38 key fob, it should provide us newbies with the information to decide on how to best tackle the problem of a duff or missing key, heres the deal.

Fleabay regularly has used P38 fobs for sale :hand: . However all the advice that is in various Forums suggests that a used fob cannot be subsequntly reprogrammed to work on a different vehicle. Getting a new blade fitted and having that cut to suit is of course easy peasy, but although it will get you into the cab it wont get the engine running no matter what method of key syncronising is used.

I spoke to a locksmith I have used to sort out diffcult problems in the past, and he tells me that as far as he is aware [and he would know!] the range rover key fob cannot be reprogrammed, either by the dealer, or anyone else. So, dont be fooled by the 'needs to be reprogrammed' sh*t on the ebay description, what you are buying is a key that can only be used to input the EAS code - no bad thing, but equaly, no need to spend £60 when for a tenner or so a non chipped key blank can be cut for you by the local locksmith??? :idea:

This means that the only route is a NEW key fob either from the dealer or an auto locksmith - coincedentaly neither my man nor the local LR dealer had any P38 ones in stock, both were back ordered.

Of course it isnt that simple is it!! The replacement NEW key fob is programmed by LR to work on your particular vehicle, but, you need to know if your exsisting key is key, 1,2,3 or 4. This is because the cars computer will not syncronise 2x the same key ie two 'Key 1's ' for example. Whether this is a problem if you have no keys at all I didnt ask, but suspect the same still applies, in my case I have a working key so really need to know if it is a 1,2,3 or4 so I dont inadvertantly order the same key number at £144.68 inc Vat from the dealer [ non OE alternative/replacements might be cheaper, but I have a Range Rover and want a Range Rover key !!!}.

The key number is on the little decal on the rear face of the key fob - if you have no decal, like me, there is no way of decoding the key to determine its number. So to be safe you need to order a key 3 or key 4, on the assumption that when new the truck will have been supplied with an active Key1 and Key2 with an inactive Key3 and possibly Key4, and previous owners hopefully have not previously ordered an active key3/or4 to replace lost keys !?!?!?!

The Dealer can get the EKA code there and then for your vehicle on presentation of the vehicle VIN and naturaly, proof of ownership! - the V5 in our case in UK. This code when entered gives access to the cab `) and allows the engine to be started without an active key fob or working 'chip' just a correctly cut key blade `) . The computer gives you three attempts before it locks out the system for 30 mins - just what you need at night in the cold and rain /:( . The engine management system stays inactive for 5 mins after the engine is subequently switched off and in that time the engine can be restarted using the inactive Key blade. After the system has reset itself you need to do the EKA thing again - not handy if you switched the motor off to save fuel [and be environmentlay aware!!] whilst on the highway in a traffic jam :oops: !

The Dealer highly recommended I tried the EKA procedure and familiarised myself with it [whlst I had a working key fob which will override any computer lockouts] before I had to do it for real on a cold dark and rainy night. A tip he gave was to peer into the cab at the dashboard as when inputting the EKA code one of the green indicator lamps lights up as the code is entered - looking at this might prevent inadvertant 'missing' a particualr sequence and causing a lock out.

I have not checked myself out on this process yet but will heed the dealers advice.

Succumbing to the inevitable I have ordered a new key from LR at £144.68, I will decide later what to do with the fleabay fob, perhaps i'll try and transplant my exsisting 'good' fobs internals into the fleabay carcass - which is in really good shape much better than my original, or just keep it as an EKA device.

Hope this helps someone not to waste [more] money!

Gordon
 
#3 ·
1. key fob numbers - I bought mine with key #4 & #1 was the least expensive to order after I b*****ed number 4 when replacing the button membrane
2. tried to use an aftermarket reprogramming service akin to that suggested in the link and............ I'd suggest as a newbie of 14 months just go for a LR dealer but check costs as they may be different
3. there is if I recall the option to disable the security for the ECU & whilst this may work it is an issue to be advised to the ins co.....
 
#4 ·
Of course it isnt that simple is it!! The replacement NEW key fob is programmed by LR to work on your particular vehicle, but, you need to know if your exsisting key is key, 1,2,3 or 4. This is because the cars computer will not syncronise 2x the same key ie two 'Key 1's ' for example. Whether this is a problem if you have no keys at all I didnt ask, but suspect the same still applies, in my case I have a working key so really need to know if it is a 1,2,3 or4 so I dont inadvertantly order the same key number at £144.68 inc Vat from the dealer [ non OE alternative/replacements might be cheaper, but I have a Range Rover and want a Range Rover key !!!

Not true you can own two keyfobs with the same number ie two key 1 as an example.
I have two Number 2 key fobs(dont ask how!!). The short coming is that only one can be sync to your vehicle at a time.I use one for atime and then sync the other one and use it for a while.Of course the first one will then no longer work until it is resynced. :thumb:
 
#8 ·
Sadly this is no longer true. Replacement keys all come in "black" now. For instance I have #1, #2 and #3 replacements for one of my rigs and all three are identical. Others have reported the same outcome when receiving their replacements on this side of the pond.
 
#6 ·
I used a similar service on another vehicle but to be fair I wasnt that pleased with the general feel and quality of the seperate fob relative to the OE key and so for the Range Rover I decided to get a 'proper' all in one integated key. The aftermarket ones are a cheaper alternative though, no question.

I didnt fully understand why you could not have two keys of the same number and only one work? but having to resync it is clearly the reason, so I guess as it is only a spare key it probably isnt an issue - past experience suggests that when you eventualy need your spare keyfob, it doesnt work anyway without fresh batteries!!!

Every days a school day!

Gordon
 
#7 ·
i know it is old thread but the topic attracted me to share the knowledge just i want to add this information i had before i lost one of them 2 key fob i used to use them both key 1 and key 2 at the same time on my 2001 4.6, one was with me and the other was with my wife and whenever i need the car i unlocked it by remote key 1 or 2 without problems until one of them lost now i will make another copy blade only not the electronic part as i did before with my other 98 autobiography which working without original key.
 
#9 ·
Hi All,

have a problem similar as described above.
Bought a 2001 P38 4.6 HSE Vogue. Guess don't have to tell you why :)
The car was delivered with only 1 key and no EKA.
I got the EKA and ordered two new keys (one for the wife and one for me, the one what was with the car will be spare)
So I went to the LR dealer and two days ago I ordered two keys ( I did not know about #1 etc. )
Quickly two keys came in and today I picked them up. The mechanic would synch them, but hurrah it did not work.
I now can only use them as EKA keys,
I found out about the issue of #1 etc. and the one key I had with the car has #1.
The two new keys have #1 and #2

So what to do now?
I contacted the LR dealer and they said I had to make an appointment to hook up the car to the testcar to sync the keys? Wonder if that will do the job, having read the above.
I have made an appointment in a few days, but if anyone can give me advice or (a) tip(s) on how to sync the keys ( I do know the procedures, have tried them and they did not work.
Probably it is possible (by the LRD) with the computer testcar to reprogram the car's computer, but it is only a chance and might not work,
But it could be an option trying.

So If you have any suggestion on how I could get the new keys #1 and #2 synchronised with my car, that would be very much appreciated.

Frans
 
#11 ·
Detecting key 1 and 2?
Why not set the seat preferences memory to oh, say, all the way forward for driver one (Key 1) and all the way back for driver 2 (Key 2) then use whatever key you have and see where the seat goes?
If you have a key 1 it will run the seat forward when, after super locking the car with the fob, unlock is pressed for more than 1.5 seconds
If it is key 2 then simply lock (not super lock) the car, press unlock for more than 1.5 seconds, and back it will go.
This procedure is in the manual
The fobs may not be able to tell you which they are, but the Rangie, with it's trick automatic seats will!

Now, the disclaimer:
I tried this with a known Key 1 on my 02 and a known key 2 on my 99 and the seats never moved. I will have to get out the FM and find out if this has been disabled in firmware.
As always, Good Luck!
 
#12 ·
I remember reading Callrover could fit a new chip in a used key fob and reprogram it for another car. Guy was called Rick the Pick. He has not been on here for a long time.
 
#13 ·
Interesting - I'll have to ask him about that at some point when I call him about repairing some old BECM's I have.

I know it is possible to program old key FOBs to a different BECM if you have the FOB code from the old BECM, but didn't know that he had the chips to program another FOB...
I've got a few spare FOBs lying around aswell - if that's the case, it might be an alternative to me buying a second FOB.

More food for thought!!

Marty
 
#20 ·
Bought a 2002 Range Rover HSE 4.6 a few weeks ago from a dealership. It has since come with a myriad of problems, one, that the car did not come with the key fob.

The dealership said they don't have it. They told me to go to Land Rover. I called, and the cost is $400+ to get one key fob.

I have read the forum, however, a little loss. Is there an alternative place to purchase the fob? And then have it activated by Land Rover? Or somewhere that can do both? Please advise.
 
#22 ·
It is possible to use secondhand key fobs as long as the Lockset Bar Code of the donor vehicle is known. If it is not known, a main dealer should be able to find it out from the VIN No. but may require proof of ownership - difficult if the keys are bought on fleabay. Also assuming the locks have not previously been changed and the key is the correct frequency for the country.

Once the 14 digit Lockset Bar Code is known, the 9 digit key Fob Code can be found. The Blackbox Systems Faultmate forum can supply it. The new Fob Code can then be entered and saved in the BECM to allow synchronisation.

A mixture of keys from different cars obviously cannot be used.
 
#23 ·
Or if you have the SM035 Faultmate module and the old BECM that the keys come from you can read the 3x 3 digit fob codes out of the old module and program them into another BECM to get the keys to work. I have a few sets of fobs from vehicles that have been scrapped, which I've kept record of the fob codes for, just in case someone wants a set of keys, then the remotes can be programmed.

Still easier if you know that the BECM/lockset is original to just get a key from the dealer... I'm looking forward to getting my spare one from them when JLR pull their finger out - it's been 5 weeks now!
 
#24 ·
Hi i was just about to order a key for my p38 when i came across this post.i had no idea about keys 1,2 or 3,so glad i found this before i ordered my new key.Just to confirm then i bought the car with key no1,so if i order a key to be programmed to key no 2 i should be fine is that correct thanks
 
#25 ·
the issue of keys 1 2 3 or 4 - when i ordered a 2nd key for my 2nd RR Stratstone Doncaster showed me the parts listing on their dealer pc = numbers 3 and 4 were no longer listed, (they were all listed back in 2012 when i had to replace a broken unit on my previous RR) said i wanted no,2 and when they entered the part number it automatically listed part number for key 1 which i verified with them so whilst i now have 2 keys if i want to use it i have resync the key to the car - disabling the other key so no preset seat positions for me and the wife/:( just an expensive spare. if the us dealers can still supply other numbered keys it may warrant a call to JLR UK asking why.....
 
#27 ·
Effectively, yes...

Though it can't hurt to ask if you can get it as a key 2... I don't see there being any difference these days physically as it has to just be a different ID the key is programmed to. I don't understand why they can't be done - if the same programmer is used to program a key 1 for example.

I guess I am lucky with mine - I got given Key 2 when i bought it so have been able to order a spare Key 1...
 
#28 ·
Is there any way of knowing what key I already have? I've only got one for the ex-plod and the label was scraped off years ago so it could be any of them. I've got the lockset barcode on the printout that I got from LR when I needed to find out the EKA code although I doubt that is going to be much use to me. I'm actually not sure what I'd do with a spare key. Unless I lost my key then I wouldn't need it. If I left it in the house then I'd be stuffed if I lost it while I'm 1,000 miles away from home so ideally I'd need to find somewhere I could leave it with the car where I could get to it if I ever needed it.
 
#29 ·
Not unless you have memory electric seats, no.

I found mine out as you can 'lazy unlock' the vehicle if it's superlocked - and if it's a Key 1 or 2, then it will move the seat to either preset 1 or 2 respectively. I set my presets at opposite ends of the travel, superlocked it, and then lazy unlocked and found the seat moved to preset 2 to match with Key 2.

Other than that, I don't know of any other way of telling. I've been thinking about trying to read the data stream from the RF receiver to the BECM and then do it with both keys (when my other one finally arrives) and see if it's possible to identify what tells the BECM its key ID.
 
#32 ·
I will decide later what to do with the fleabay fob, perhaps i'll try and transplant my exsisting 'good' fobs internals into the fleabay carcass - which is in really good shape much better than my orobi all

Beware some of those cases, I can only remember 1 that I purchased that the existing blade actually fitted, sorry can't remember which 1, was a few years back
 
#34 ·
The RF signal from the fob to the receiver is on a rolling algorithm, so the signal will vary every time. The part that does the coding is a National Semiconductor COP8622C. The Motorola BECM CPU also contains the same algorithm at the other end. The COP processor could probably be hacked. `)
 
#35 ·
Yeah, I figured the COP chip was the bit that did all the work in the FOB, and having a read through the data sheet is interesting, but don't think there is any easy way of retrieving the information from it.

I managed to get a hold of a programmer from eBay which apparently will program the Motorola CPU units... so I'm going to see if I can hook it up when I'm back from work and see if I can talk to it.

I have a couple of logic boards at home which have multiple faults on them, so messing about with one of the CPU chips on them isn't going to be an issue if I somehow destroy it!!!!

I have a spare 3rd gen receiver which was in a vehicle we stripped for parts awhile ago, so thinking of seeing if that data stream sent to the BECM can be captured and then analysed as it should hopefully be a more pure data stream.

Probably all a bit beyond me when I get into it, but will be fun to try and get anything out of it.

Pwood999, if you are interested in taking another look at some point, then it would be great to have another set of eyes on it!

Dave3d... you make good points too... there has to be some way of capturing the stream and analysing it, as otherwise the remote fob services that can clone the remotes and basically give you a second one of the same key number would be out of a job. I am guessing they identify the algorithm, decode the data in it and then program it back to a blank chip. What would be good is to see about capturing data from a key 1 and key 2 of the same lockset, and then being able to decode it and see what differences there are which may identify what the key ID is.

Probably a lot of work for little to no gain! But maybe a fun project. ..

Oh and I tested a theory you mentioned to me awhile ago with the BECM / instrument cluster connection and it does indeed work.