Sometimes it pays to read the owner's manual.

[MarshPhantom]

I've had a problem with the oil pressure light coming on whenever we drive the campervan, it started off intermittently but now comes on all the time. I even bought an oil pressure gauge to check it myself.

Looking in the owner's manual it turns out the warning lamp I thought was oil pressure related actually means that the coolant needs topping up. I filled up the water and everything is fine.

[davepoth]

And you admitted that on a motoring website? Brave.

[s3fella]

Remember to check the olive oil and ketchup levels too.

[HustleRussell]

There's something wrong with the handbrake on my car, the warning light comes on every time I use it. And the indicators are intermittent.