Hi guys. The car ('02 S80 T6) has been running well so haven't been on for a while - but now I have a problem....

I cleaned my throttle valve and at the same time cleaned the temperature sensor and boost sensor on the hose connecting the throttle to the intercooler. When I started the car up it seemed to work fine initially but the next day seemed to have a rough idle and surge at idle (could be I just didn't notice it earlier after the throttle cleaning).

I disconnect the MAF while it is doing this and no change. When I disconnect the booster sensor (is this called the MAP?) the idle settles down. Does this confirm the problem is the boost sensor? If not what could it be?

Thanks,

George

 

PS: My mistake - not boost sensor but pressure sensor. Also, codes puled were; P2096, P2097, P0171, P0174, P0507 - to do with mixture being too lean and idle RPM high