Red light
Bonnet Open Warning
The bonnet is not fully closed or its switch reports it as open.
Normal risk
Stop safely and close the bonnet. A bonnet that opens while driving can block your view.
Short answer · Why does the bonnet open light stay on with the bonnet closed?
The bonnet switch in the lock may be dirty, corroded or misaligned. Open and firmly close the bonnet. If the light stays on, have the switch checked; it can also disturb the alarm.
What to do
- Stop and close the bonnetPress it down firmly until it latches.
- Check the latchMake sure the safety catch engages.
- Have the switch checkedA faulty switch can also trigger false alarms.
How is the light behaving?
| What you see | What it usually means | What to do |
|---|---|---|
| Steady | Bonnet open or switch fault | Stop and close the bonnet |
Possible causes
- Bonnet not fully closedThe most common cause.
- Dirty or corroded switchThe switch sits in the engine bay.
- Misaligned latchAfter a repair or small impact.
Don't confuse it with
Questions about Bonnet Open Warning
Can a faulty bonnet switch set off the alarm?
Yes, the alarm thinks the bonnet was opened.