Can you clean a MAP sensor ?

Usually yes.

Yes, sometimes, you havent got anything to loose though.

DO NOT direct any fluid or air under pressure into the MAP sensor- you'll break it. In this application its not designed to read positive pressure.

Instead aim your carb cleaner *across* the port, allowing some to go down the pipe inside. Swish it about abit and then shake out the fluid before it evapourates. Repeat several times.

Tim..

Anyway I can visual inspect test it? Could I pour say meths or white spirit down the spout and swish around?

Err...are we talking about the MAP or the MAF sensor? The MAF sensor is usually a barrell type-shaped object that sits downstream of the throttle body, upstream of the air filter. The MAP sensor is usually mounted somewhere with a thin hose attached to it. The hose will make a hissing noise when disconnected and the engine running.

If it's the MAP sensor, follow Tim's advice. If it's the MAF sensor, I wouldn't clean it. It heats up and should burn any shitey small particles that get past the air filter. MAP = clean or replace, MAF = replace.

hmmmm, common fix for a MAF is to spray carb cleaner directly onto the element!!

Well certainly in the Subaru corners anyhow.