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Airbags
Citroën Airbags warning lamp in car: airbag or belt fault
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
A fixed Airbags lamp on a Citroën means one of the airbags or seat belt pyrotechnic pretensioners is faulty. Drive carefully and go to a Citroën dealer or qualified workshop: in a crash, the system might not work.
Safety first
Stop and check this first
- Do not touch airbags, pretensioners, connectors, under-seat wiring or the steering wheel. Citroën says all such work must be done by a Citroën dealer or qualified workshop.
- With the Airbags lamp on, the airbags and pretensioners may not work in a crash. Always wear your belt and do not fit a rearward facing child seat in the front passenger seat.
Safe checks you can perform
- Confirm the lamp stays on
- No rearward facing child seat in the front
- Keep the airbag areas clear
Leave these tasks to a qualified professional
- Do not attempt this professional task: Airbag system diagnosis
- Do not attempt this professional task: Seat belt check after a collision
- Do not attempt this professional task: Check after a front door repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Airbag system diagnosis
What they doThe dealer or workshop reads the airbag control unit fault memory to find which airbag, pretensioner or sensor logged the fault, without you touching any of those parts.
They must show youthe fault memory readout (stored and pending codes) and the component each code refers to.
In writingthe codes found, the part replaced, the final test with the lamp off and whether codes were cleared before or after the repair.
Seat belt check after a collision
What they doAfter an impact in which the pretensioners fired, the workshop checks the seat belt system and replaces it if necessary.
They must show youwhich pretensioners or airbags the readout lists as triggered and their condition.
In writingthe items replaced, the reference of the belt or airbag fitted and that the lamp was off afterwards.
Check after a front door repair
What they doIf the lamp appeared after a side impact or a door repair, the workshop checks the impact sensors in the front doors.
They must show youthe code linked to the side impact sensor and the condition of the sensor checked.
In writingthe sensor checked or replaced, the work done on the door and the result of the final readout.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Confirm the lamp stays on
- Who:
- you, with the car stationary and the ignition on.
- How:
- switch on the ignition and watch the panel. Some lamps light for a few seconds and go off when the engine starts; the fault alert is the Airbags lamp staying on fixed, sometimes together with another lamp on the panel.
- Result that matters:
- telling the normal check at ignition apart from a real system fault.
- If it goes off after a few seconds:
- there is no fault alert, but note it if you saw it fixed earlier.
- If it stays on fixed:
- drive carefully and book a Citroën dealer or qualified workshop.
- Evidence to keep:
- photo or short video of the panel after starting, with the lamp visible.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
No rearward facing child seat in the front
- Who:
- you, if you carry children while the lamp is on.
- How:
- seat children in the rear, which the handbook says are the safest seats. With the front passenger airbag deactivated (OFF), a rearward facing child seat is allowed in the front seat, unless there is a fault with the airbags shown by the Airbags lamp being on.
- Result that matters:
- no child travelling rearward facing in the front while the system has a fault.
- If you can fit the child seat in the rear:
- keep it there until the repair.
- If the front seat is your only option:
- do not fit the seat rearward facing and get the repair done first.
- Evidence to keep:
- note of where the child seat is fitted while the fault lasts.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
Keep the airbag areas clear
- Who:
- you and your passengers, until the workshop checks the system.
- How:
- sit upright with the belt correctly positioned, keep anything from between occupants and airbags, do not attach objects to the steering wheel, dashboard, roof or seat backrests, and use only approved seat covers compatible with the lateral airbags. Never dismantle or strike the steering wheel.
- Result that matters:
- nothing interfering with the airbags that still work or with their inspection.
- If there are unapproved covers or accessories:
- tell the workshop when you take the car in.
- If everything is as supplied:
- say so anyway so the workshop can rule that out.
- Evidence to keep:
- photos of the driving position and front seats as they are.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Vehicles
- Brand
- Citroën
- Product type
- Cars
Known code variants
- Airbags
- Airbags or pyrotechnic pretensioning systems fault
- Airbags warning lamp
- aviso airbag o pretensores Peugeot 208
- Citroën airbag light on
- Citroën C4 airbag fault
- Fallo de airbag Citroën
- Fallo de los sistemas de airbag o del pretensor pirotécnico
- Fallo de uno de los airbags o de los pretensores pirotécnicos
- fallo pretensor pirotécnico
- fault with one of the airbags or seat belt pyrotechnic pretensioners
- luz airbag Citroën
- Peugeot 208 airbag light stays on
- seat belt pretensioner fault
- SRS light Citroën
- testigo airbag encendido Citroën C4
- testigo airbag encendido Peugeot
- Testigo Airbags
- Testigo de alerta de airbags
What it means
In the Citroën C4 handbook (edition 01-20), the Airbags lamp fixed means 'One of the airbags or seat belt pyrotechnic pretensioners is faulty' and sends you to a Citroën dealer or qualified workshop. The handbook warns that with a malfunction the airbags may not deploy in a serious impact. The lamp also comes on in every case where the pretensioners have fired in a collision. Other Citroën handbooks may vary, and the Airbags lamp being on does not by itself prove which airbag, pretensioner or impact sensor has failed.
Warnings and stop conditions
- Criticalsource verified
Do not touch airbags, pretensioners, connectors, under-seat wiring or the steering wheel. Citroën says all such work must be done by a Citroën dealer or qualified workshop.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
- Highsource verified
With the Airbags lamp on, the airbags and pretensioners may not work in a crash. Always wear your belt and do not fit a rearward facing child seat in the front passenger seat.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
Symptoms and causes
Probable causes · in order
- Fault in an airbag or pretensionerCommon
The handbook links the fixed lamp to a fault in one of the airbags or pyrotechnic pretensioners; which one only a workshop readout can tell.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
- Pretensioners fired after an impactPossible
Citroën says that when the pyrotechnic pretensioners are triggered in a collision, the airbag lamp comes on in all cases and the system must be checked.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
- Damaged or badly repaired front doorLess common
The front door panels contain side impact sensors; damage or incorrect work on them can upset the operation of the lateral airbags.
Evidence: Handbook Citroën C4 edition 01-20 (en-GB)
Virtual technician
Does Airbags still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Handbook Citroën C4 edition 01-20 (en-GB)
Citroën (Stellantis) · 2020 · manual
- 2
Guía de utilización Citroën C4 edición 01-20 (es-ES)
Citroën (Stellantis) · 2020 · manual
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