I have a volvo v70 d5, an my intercooler has a slight leak. could this affect my performance, as i accelerate hard, engine service urgent light comes up on dash. i have changed my air mass sensor, it made no difference.

when the light flashes there is a misfire taking place check the plugs and spark plug wells look for black lines down the sides of the plugs

U have a vacuum leak causing your headache

Many many reasons for this (I have a D5 myself). First and most common is a split intercooler or hose, then if not that the turbo control valve on the front of the airbox. I would bet on the intercooler though. My poor baby is currently off the road for a new turbo itself so that is the worst case scenario. Look for oil at the bottom of the skid pan below the rad and check jubilee clips for security. Also check the L shaped pipe from the EGR valve to the block,this is prone to splitting on the underside where you cant see it

These can be regenerated without harm to the engine. Volvo has a procedure for doing this. I have not seen it published for the general public. You should be able to politely ask a Volvo servicemen for the recommended procedures and they will generally help you out.

The service indicator works on how you drive the car rather than on mileage

could be gas filler kneck that goes from fuel tank door /cap to---gas tank lines do apear to be in that locating it could be sucking air +++not fuel+++that might cause that fault code you retreved i seen this before****.John

See if you can pull the airbag fuse to avoid accidental deployment of the airbags. It sounds expensive.

Yes they are, you need to run the trouble code test and find out what is stored in memory.

press and hold button below speedo immediately switch ignition on Keep button depressed until service message has been reset release reset button within 4 seconds there will be an audible signal when reset complete if reset button is not released within 4 seconds then the service interval indicator will not be reset.

Good Luck