Treat as urgent. If gas or CO is genuinely suspected, ventilate, get out, and don't operate switches or naked flames.
What it means
This light covers everything from a handbrake left partially on to low brake fluid or a genuine hydraulic fault. Given the extra weight a motorhome carries, braking performance matters even more than usual.
What to do
- Check the handbrake is fully released first - it's the most common cause.
- If it stays on, check the brake fluid reservoir level once stopped safely.
- If fluid is low or the light persists, don't continue driving - get it recovered and inspected.
Likely causes
- Handbrake not fully released
- Low brake fluid level
- Worn brake pads (given the extra load, these wear faster than on a car)
- A genuine hydraulic system fault
Rough UK cost
Brake pad/disc replacement is typically £150 - £400 per axle, given the heavier braking loads.