Unable to code new fob.

Questions not related to the fuel type, like Manual Gearbox, Body Work, Lights, Interior trim and Seats, Steering, Brakes, Beeping, Wheels and Tyres to be asked in this topic only.

Audio has its own section - see further down the page.

Please provide as much information as you think may be relevant like recent work on the car and you can attach photographs directly to your topic using the form below the text box.
My Name:
MrSmith

Member
Posts: 1
Joined: Wed Oct 06, 2021 8:05 pm
Model: C3 2009-2013, New shape (A51)
Year: 2002 (02)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 80000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Hi, first time posting here and it's a bit of an odd one. Hoping someone can shed some light.
My daughter has a 2010 c3 vtr+ bought to learn to drive in. It only came with a single key to manually unlock the car. I said when she passes her test I would treat her to a remote plipper.
Now, she passed last week so I organised a mobile key guy (whom I've used twice in the past for new fobs) to come and sort it out. He couldn't get the car to accept a remote fob, he had an odb scanner and said there were no fault codes listed and he wasn't sure why he couldn't get it to work. I wasn't home while he was here so don't know exactly what he did but he drew a blank.
The key that came with the car works the central locking from both the driver's and passenger door.
Any ideas what could be wrong? Would prefer to avoid taking it to dealer for them to plug it in.
Many thanks in anticipation.
User avatar
My Name:
Ozvtr

Moderator
Posts: 1333
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 80 times
Been thanked: 417 times

Post

The cars run two completely independent security systems for the engine management and body locking. Well, not completely independent but I don't want to muddy the waters here.

The engine management system uses an unpowered RFID chip in the key to identify a valid key and start the engine.

Locking/unlocking of the doors is carried out by a small powered transmitter (again in the key).

To code either or both will require a 4 character engine ECU PIN code from PSA (either Peugeot or Citroen) AND a 5 character authentication code. The authentication code is just to make sure you are a technician and not just someone "poking" around. A good locksmith will know this code. However, the engine ECU PIN code will need to be obtained from PSA. It's peculiar to your engine ECU. Hmm is it Stellantis N.V. now who owns the Citroen marque?

That is the process but I cant tell you which part he was having problems with. Coding the RFID chip to get the engine to run should be simple (as long as you know the codes). However the Chinese knock-off transmitters for locking/unlocking can be problematic. Maybe they'll work, maybe they wont!?
My Name:
Missing Lincs

Moderator
Posts: 844
Joined: Mon Mar 05, 2012 9:29 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.1
Fuel Type: Petrol
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Location: United Kingdom
Has thanked: 46 times
Been thanked: 36 times

Post

Just to add to Ozvtr's reply. it's not impossible to programme early C3 keys and fobs with generic kit however to be sure of success you really need to be using Lexia, Citroen's own diagnostic system. You mentioned that your locksmith used and OBD reader, the early C3s aren't CAN-Bus compliant, they had their own version, VAN-Bus. A reader designed for CAN won't be able to properly link to your car and all the modules.

I would also suggest that you buy the remote part from Citroen, it will work whereas, as Ozvtr says, the ones and ebay can be 'difficult. Even a genuine OEM part from a third party supplier isn't guaranteed to work. Or put another way, been there done that!
If at first you don't succeed, destroy all the evidence and pretend you never tried :lol:
  • Similar Topics
    Replies
    Views
    Last post

Return to “Questions about a Citroen C3 not related to the fuel type”

  • Information
  • Who is online

    Users browsing this forum: Bing [Bot], CommonCrawl [crawler], ComScore [crawler], PetalSearch [bot] and 1 guest