The warnings are grouped by urgency, starting with the ones that need a workshop soonest.
Quick Reference
Scroll the table sideways.
| Warning |
Urgency |
In short |
| Service Warning |
Get it checked soon |
General fault or service due: read the message |
| Pedestrian Horn |
Get it checked soon |
Pedestrian warning sound fault |
| Engine Self-Diagnostic System (Petrol or Diesel) |
Get it checked soon |
Engine or emissions fault (urgent if flashing) |
| SCR Emissions Control System (BlueHDi) |
Get it checked soon |
AdBlue/SCR emissions system fault |
| Electric Parking Brake Malfunction (With Electric Parking Brake) |
Get it checked soon |
Electric parking brake fault |
| Anti-Lock Braking System (ABS) |
Get it checked soon |
ABS fault: normal braking still works |
| Power Steering |
Get it checked soon |
Power steering fault |
| Emergency Brake Malfunction (With Electric Parking Brake) |
Get it checked soon |
Emergency braking via parking brake reduced |
| Hill Start Assist |
Get it checked soon |
Hill start assist fault |
| Lane Positioning Assist |
Get it checked soon |
Lane positioning assist fault |
| Airbags |
Get it checked soon |
Airbag or pretensioner fault |
| Tyre Pressure Monitoring System Fault |
Get it checked soon |
Tyre pressure monitoring not working |
| Automatic Main Beam Fault |
Get it checked soon |
Automatic main beam fault |
| Particle Filter (Diesel) |
Action needed from you |
Diesel particulate filter needs cleaning |
| Low Fuel Level (Petrol or Diesel) |
Action needed from you |
Fuel reserve reached |
| Low Traction Battery Charge (Electric) |
Action needed from you |
Electric battery low |
| Turtle Mode (Limited Driving Range) (Electric) |
Action needed from you |
Battery critical: reduced power |
| AdBlue® (BlueHDi) |
Action needed from you |
AdBlue running low |
| Tyre Under-Inflation |
Action needed from you |
Low tyre pressure |
| Engine Pre-Heating (Diesel) |
Information / status |
Diesel glow plugs warming up |
| Automatic Functions Deactivated (Electric Parking Brake) |
Information / status |
Auto parking brake functions switched off |
| Collision Risk Alert/Active Safety Brake |
Information / status |
Active Safety Brake status or fault |
| Dynamic Stability Control (DSC)/Anti-Slip Regulation (ASR) |
Information / status |
Stability control active, off or faulty |
| Lane Keeping Assist |
Information / status |
Lane keeping assist status or fault |
| Front Passenger Airbag (ON) |
Information / status |
Front passenger airbag ON |
| Front Passenger Airbag (OFF) |
Information / status |
Front passenger airbag OFF |
| Parking Sensors |
Information / status |
Parking sensors obstacle, fault or blocked |
| Stop & Start (Petrol or Diesel) |
Information / status |
Stop & Start off or faulty |
| Rear Foglamps |
Information / status |
Rear fog lamp on |
Service Warning

The Service lamp (a spanner or exclamation mark, depending on the model) is a catch-all for faults that don't have their own dedicated lamp. The message that comes with it is the key.
Scroll the table sideways.
| How it looks |
What it means |
What to do |
| Comes on briefly with a message |
One or more minor faults |
Read the message. Some you can fix yourself, such as a flat key fob battery; others, such as a tyre pressure system fault, need a workshop |
| Stays on with a message |
One or more major faults |
Read the message and have the car checked soon |
| Stays on, with "Audible Warning System fault" |
The warning chime system has failed |
Driving aids such as Active Safety Brake, lane keeping and road sign recognition may not work. Have it checked |
| Lamp on, spanner flashing then steady |
Service overdue |
Book a service as soon as possible |
Pedestrian Horn

Hybrid and electric Peugeots make an artificial sound at low speed so that pedestrians can hear them coming. This lamp means that system has a fault, so people may not hear the car approaching.
What to do:
- Take extra care in car parks, towns and around cyclists and pedestrians
- Have the system repaired soon. It's a legal requirement on new electrified cars in the UK, EU and US
Engine Self-Diagnostic System (Petrol or Diesel)

The orange engine symbol is what most people call the "check engine light". How it behaves tells you how urgent it is:
Scroll the table sideways.
| How it looks |
What it means |
What to do |
| Flashing |
Engine management fault, such as a misfire, with a risk of destroying the catalytic converter |
Reduce speed and have the car checked by a dealer immediately. Avoid heavy acceleration |
| Steady |
Emissions control system fault |
Have it checked without delay. It should go out once the engine starts if the fault clears |
A steady light is not an emergency, but it is something you shouldn't ignore. Some faults affect fuel economy, and in the UK a car with an illuminated engine light fails its MOT.
SCR Emissions Control System (BlueHDi)

The SCR (selective catalytic reduction) system uses AdBlue to cut NOx emissions from BlueHDi diesels. The handbook describes three stages:
- Lamp on with a chime and message at start-up: a malfunction has been detected. The alert clears once emissions return to normal
- AdBlue lamp flashing, engine lamp steady, with range shown: a fault is confirmed. You can drive up to about 685 miles (1,100 km), depending on the message, before the car blocks restarting. Book it in now
- Same lamps, "starting prevented" message: the driving limit has been used up and the engine won't restart. Call a dealer or Peugeot Assistance
Electric Parking Brake Malfunction (With Electric Parking Brake)

Shown with the message "Parking brake fault", this means part of the electric parking brake isn't working properly.
- If the switch isn't responding: the automatic apply/release functions take over and are reactivated automatically, so use them and have the switch repaired
- If the brake itself is faulty: to hold the car when stationary, pull and hold the switch for about 7-15 seconds until the lamp lights. If that doesn't work, park on level ground, engage a gear (manual) or select P (automatic) and chock a wheel
Either way, contact a Peugeot dealer or workshop.
Anti-Lock Braking System (ABS)

If the ABS lamp stays on, the anti-lock system has a fault. You still have normal brakes, but the wheels can lock under hard braking, especially in the wet.
What to do:
- Drive carefully at moderate speeds and leave extra distance
- Have it checked soon
- If the red brake lamp comes on as well, stop: that combination can mean an EBFD fault
Power Steering

A steady amber power steering lamp means a minor fault has been detected. The steering may feel heavier than usual.
What to do: drive carefully at moderate speed and have it checked by a dealer or workshop.
Emergency Brake Malfunction (With Electric Parking Brake)

With the message "Parking brake fault", this warning means the electric parking brake's emergency braking function (used if you hold the switch while moving) won't work at full performance.
What to do:
- If automatic release isn't available, release the brake manually using the switch
- Have the system checked by a dealer or workshop
Hill Start Assist

Shown with the message "Anti roll-back system fault", this means hill start assist isn't working. The car may roll back briefly when you move off on a slope.
What to do:
- Use the handbrake or parking brake for hill starts until it's fixed
- Have it checked by a dealer or workshop
Lane Positioning Assist

When this lamp comes on with the Service lamp, the lane positioning assist system, which keeps the car in your chosen position within the lane, has a fault. Keep both hands on the wheel and have the system checked.
Airbags

A steady airbag lamp means one of the airbags or seat belt pretensioners has a fault. In a crash, it might not deploy.
What to do:
- Have the car checked by a dealer or workshop as soon as possible
- Until then, avoid fitting a child seat in the front passenger seat
In the UK, an illuminated airbag warning lamp is also an MOT failure.
Tyre Pressure Monitoring System Fault

If the tyre pressure lamp flashes and then stays on, and the Service lamp is also lit, the tyre pressure monitoring system itself has failed. The car can no longer warn you about low tyre pressures.
What to do:
- Check your tyre pressures manually with a gauge
- Have the system repaired
Automatic Main Beam Fault

With a chime and message, this means the automatic main beam function or its windscreen camera has a fault. Dip your headlights manually for oncoming traffic and contact a Peugeot dealer or workshop.
Particle Filter (Diesel)

Diesel particulate filters trap soot and burn it off periodically, which needs a decent run at speed. Lots of short journeys can stop that happening.
Scroll the table sideways.
| Message |
What it means |
What to do |
| Risk of particle filter blockage |
Filter nearly full |
When traffic allows, drive at 37 mph (60 km/h) or more with the engine above 2,500 rpm until the lamp goes out |
| Additive level too low |
Additive tank low (on models that use it) |
Have it topped up at a dealer without delay |
A dual carriageway or motorway run of 15-20 minutes usually does the job. Stick to the speed limit.
Low Fuel Level (Petrol or Diesel)

When the low-fuel warning first appears, there are only a few litres left in the tank: around 5-6 litres depending on the model (check your handbook for your car's reserve). Until you refuel, the warning comes back every time you switch on the ignition, and more often as the level falls.
What to do:
- Fill up at the next opportunity
- Don't run the tank dry. Peugeot warns this can damage the emissions control and fuel injection systems
Low Traction Battery Charge (Electric)