volvo s40, looking for tis and help while restoring and bringing my car up to standard

THanks you guys,,, it worked,,, the seevice light is gone from my 2001 s40,,,, the Dealerships are all thieves... they charge $600 to do a 90000 check up( checkoil, and fluids, suspension and some crap,, that is free at most shops)

Thanks Jimmy, it was a fuse in the engine bay. it was the ecu sensor fuse (10A)

I havae a 2001 S40 and it recently shut off. I got the P050 code for IACV system, checked and cleand it. The IAC valve works when I checked it from the battery, but does not work from the wire from the leads. I checked the leads and got not nothing. The car still idle with the bypass,,, but the valv...