computer saying inop side light but they work

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.
Forum rules
One question per topic.
No Engine questions
Think: Manual Gearbox, Seats, Bodywork, Lighting, Interior, A/C, Heater, Wheels, Steering, Brakes, Tyres and Suspension
My Name: fhwrd

Posts: 1
Joined: Wed Nov 23, 2011 7:26 pm


my c3 1.6 hdi is telling me that one of the side lights is not working but they are.
the constant bleep is driving my wife mad is there any one that has an answer to this problem :?:
User avatar
My Name: Arfur Dent

Posts: 3441
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 320 times
Been thanked: 121 times


Hello fhwrd, welcome!

Its the BSI computer that monitors the lights and their current draw. It would be worth considering changing the side light before any other work as they are very cheap and not the most difficult to change (but not the easiest).

C3 Side Lamps are available here

The side lamps are the W5W type that are also seen in the rear number plate lamp unit.
W5W Citroen C3 Side Lights
W5W Citroen C3 Side Lights
It can be difficult to see that these lamps have failed because they are quite dim compared to the other lamps in the headlight
You can add an avatar to your account - Avatar or change your vehicle details - Car Bio or even add a signature to your posts - Signature. But this is not all you can do in the User Control Panel :)
My Name: Hans Zarkov

Top Contributor
Posts: 38
Joined: Fri Nov 25, 2011 9:59 am
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 120000
Trim Level: Exclusive
Gearbox: Manual 5 speed


Is your car fitted with LED sidelamp bulbs? These can cause a fault too...

My Name: Prockybolton

Posts: 7
Joined: Mon Dec 16, 2013 3:45 pm
Model: C3 2006-2009, Facelift model
Year: 2006 (06)
Engine Size: 1.1
Fuel Type: Petrol
Mileage: 24000
Trim Level: VTR+
Gearbox: Manual 5 speed


Hi it's me once more , my side lights on my 06 citreon c3 were not working and only illuminated when main lights were on, problem solved I thumped the headlight and they came on must be a loose connection thanks to all for your reply,s to me and for your advise thanks Paul.
  • Similar Topics
    Last post