Immobilizer stuck on
2005 Citroen C2 Sx

Key fob is not working checked battery ok, programed it still no central lock ing working. Open manullay and still immobilizer stays on. The lock barrel seems a bit iffy!
Would a lock barrel off another c2 a year earlier 04 work or would it not work being a differant lock with the ecu?

Problem added: Jul 17, 2021 (3 months ago)
Citroen C2 (2005)
Problem Category
Running Rough, Starting & Power Loss
Replies and Fixes
You checked the fuses ?

Citroen C2 (2003 – 2009) – fuse box diagram
Year of production: 2003, 2004, 2005, 2006, 2007, 2008, 2009

Fuse box under dashboard
Citroen C2 - fuse box - under dashboard
Citroen C2 – fuse box – under dashboard
Fuse Ampere rating [A] Function
3 5 Airbags
4 10 Diagnostic socket, particle filter additive, clutch switch, steering angle sensor
5 30 —
6 30 Screen wash
8 20 Digital clock, controls at the steering wheel, radio, display
9 30 Cigar-lighter, digital clock, interior lamps, vanity mirror
10 15 Alarm
11 15 Ignition switch, diagnostic socket
12 15 Airbag ECU, rain and brightness sensor
14 15 Parking assistance, instrument panel, air conditioning, bluetooth® telephone
15 30 Central locking, deadlocking
17 40 Demisting – deicing of the rear screen
Fuse box in engine compartment
Citroen C2 - fuse box - engine compartment
Citroen C2 – fuse box – engine compartment
Fuse Ampere rating [A] Function
1 20 Water-in-diesel-fuel sensor
2 15 Horn
3 10 Screen wash
4 20 Headlamp wash
5 15 Fuel pump
6 10 Power steering
7 10 Coolant level sensor
8 25 Starter
9 10 ECUs (ABS, ESP)
10 30 Engine control actuators (Ignition coil, Electrovalve, Oxygen sensor, Injection), Canister purge
11 40 Air blower
12 30 Windscreen wiper
14 30 Air pump (petrol version), Diesel fuel heater
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market

C2, Citroen electricity
No i havnt , but too dark now, ill take a morning so i will check no 15, in car!, and the no 9 under bonnent? Or what others should i check?
Tested the fuses seem to be ok., when you put key and turn on the lights wont go off either.
What lights ? Is the car starting / engine turning over ?
The engine will turn over but not start, the central locking just will not work at all done all trying to set key fob etc. But the lock barrel seems to be not right. The key can go right round and takes a few wriggles to unlock. And as i say when you put key in to start the battery light is flashing the headlights are on even though they are off,
Tried another key ? tried this ?
Yes tried that last night
When you talk of lock barrel ,is it the ignition lock barrel or door lock barrel?
The door lock barrel
You say the fob battery is o.k , to test you would have to be in key fob , check transponder chip has not been dislodged . Strip down door trim and check operation of linkage when turning the key and spray with WD40 , working back and forth . Likewise with key barrel in door lock .If still having problems , scan for fault codes or get an auto electrician to check out .
Could there be a wire off back of the barrel? Cause theres no sound of the central locking trying to work?
As far as I know , on that car locking manually only locks / opens the drivers door . If central locking was working as it should it would work with inside locking button But looks like a BSI / immobiliser fault
Ive just had a thourght we changed the stereo in it would that have affected anything?
That makes all the difference , there is a small yellow fuse under the glove box that often blows causing your problems
Had a mobile macanic out! A wire had come off at back og fuse box ! It starts now but no central locking due to motor, we gonna get the motor off the spare car we got and put on this one.
Glad you got it fixed, thank you for updating the forum
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