Red warning lamps on the Peugeot Boxer explained: what each one means and what you should do, from coolant temperature and oil pressure to braking.
A red warning lamp on your dashboard means a fault has been detected that needs further investigation. Some red lamps simply ask you to do something, such as fasten your seat belt or release the parking brake, while others mean you should stop as soon as it is safe to do so. Some red lamps come on for a few seconds when you switch on the ignition and should go off as soon as the engine starts.
This guide covers the red warning lamps on the Peugeot Boxer I (2017-present) and applies to vehicles built from 1 September 2019. Some lamps depend on the version or equipment of your van, so you may not see every one listed here.
Scroll the table sideways.
| Warning | Urgency | In short |
|---|---|---|
| Coolant temperature | Stop safely, get help | Coolant temperature too high |
| Engine oil pressure | Stop safely, get help | Oil quality worn or oil fault |
| Battery charge | Get it checked soon | Charging, battery, ignition or injection fault |
| Opening detection | Action needed from you | A door or bonnet is open |
| Power steering | Get it checked soon | Power steering fault |
| Airbags | Get it checked soon | Airbag or belt pretensioner fault |
| Seat belt not fastened | Action needed from you | Driver's seat belt not fastened |
| Pneumatic suspension | Get it checked soon | Pneumatic suspension fault |
| Parking brake | Action needed from you | Parking brake on or not released |
| Braking | Stop safely, get help | Low brake fluid or EBFD fault |
This is the red coolant temperature warning lamp.
It comes on with H in the red zone, or stays on with the temperature needle in the red zone. It means the coolant temperature is too high or has risen abnormally.
What to do:
This is the red engine oil warning lamp.
If it flashes for a few seconds with a message in the display, the engine oil quality has deteriorated. If it stays on, either for a while or permanently, with the engine running, a lack of oil or a major malfunction has been detected.
What to do:
If the lamp flashes for a few seconds with a message:
If the lamp stays on with the engine running:
This is the red battery charge warning lamp.
If it stays on, a fault has been detected in the charging circuit or the battery. If it stays on or flashes even after you have checked the battery terminals, an ignition or injection malfunction has been detected.
What to do:
If the lamp stays on:
If the lamp stays on or flashes despite your checks:
This is the red opening detection warning lamp.
When it stays on, one of the van's doors or the bonnet is not properly closed.
What to do:
This is the red power steering warning lamp.
It stays on with an audible signal and a message on the screen, which means the power steering has a fault.
What to do:
This is the red airbag warning lamp.
If it stays on or flashes, one of the airbags or one of the seat belt pyrotechnic pretensioners is faulty.
What to do:
This is the red seat belt reminder lamp.
If it stays on and then starts flashing, you have not fastened your seat belt. If it comes on with an audible signal and then stays on, the van is moving with the driver's seat belt unfastened.
What to do:
If the lamp stays on and then flashes:
If the lamp comes on with an audible signal while you are driving:
This is the red pneumatic suspension warning lamp.
When it stays on, the pneumatic suspension system has a fault.
What to do:
This is the red parking brake warning lamp.
When it stays on, the parking brake is applied or has not been fully released.
What to do:
The braking warning can appear in two different ways.
If the red braking lamp stays on by itself, the brake fluid level is too low. If a different pair of symbols comes on and stays on together, the electronic brake force distribution (EBFD) system is faulty.
What to do:
If the braking lamp stays on by itself:
If the pair of symbols comes on for the EBFD fault:
If a red lamp comes on and you are not sure what it means, stay calm, stop somewhere safe and check for any message on the screen. Keep in mind that some red lamps come on briefly when you switch on the ignition and should go off once the engine starts. If a lamp stays on after that, treat it as a fault that needs looking into, and contact a PEUGEOT dealer or a qualified workshop.
Red warning lamps on your Peugeot Boxer are there to protect you, your van and your load, so never ignore one. Note how the lamp behaves, whether it is steady or flashing and whether there is a message or audible signal, and follow the steps above for that case.
Related guides: Peugeot Boxer (2017-present) orange warning lights, Peugeot Boxer (2017-present) green and blue warning lights and all Peugeot Boxer guides.
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