What it means
This is the same warning system as any car or van built on the same base vehicle. It means the engine's computer has detected something outside normal parameters.
What to do
- Note whether the car is running noticeably differently (power loss, rough idle).
- It's usually safe to continue a short journey carefully, but get it plugged into a diagnostic reader soon.
- Don't ignore it for long - motorhome engines already work harder carrying the extra weight.
Likely causes
- A sensor reading outside normal range
- An emissions system fault (DPF, EGR)
- Something more minor, like a loose fuel cap
Rough UK cost
A diagnostic read is typically £30 - £70; repair costs vary widely depending on the fault.