I just had engine light on and these are the codes P0075, P0102, P0458 !! Anybody has any idea what the problem is? I never noticed ant change in car performance yet, are these important codes? I have S40 2004.5 non turbo.. Thank you...

 

OBDII Code P0075 VOLVO - Intake Valve Control Solenoid Circuit Bank 1 | Engine-Codes.com (Might be the sensor)
OBDII Code P0102 - Mass or Volume Air Flow Circuit Low Input | Engine-Codes.com + (a twist) https://volvoforums.com/forum/volvo-...m-p0102-29059/
OBDII Code P0458 - Evaporative Emission Purge Solenoid Control Circuit Low Voltage | Engine-Codes.com (gas cap loose?)

Also, since we have several different engine and year combos you should post yours so that you can receive help quicker. The 1st code you posted suggests a 2004.5 or newer? Turbo?

 

Thanks Hudini, I have S40 2004.5 non turbo, so many different codes and they came on at the same time!! I dont really know where to start!!
last year I changed fuel pressure sensor but the codes were different I think !

 

The first thing is to erase the codes and see if they return. Many times an electrical "glitch" or voltage spike or the phase of the moon causes a code to be set. Erase them and see if they return. You want to make sure you have an issue before diving into it.

 

I did clear the codes and they came back. I don’t know if it’s related but I just noticed my air-condition don’t blow cold air anymore! I also notice a little of less pickup power when you push the gas pedal! I have 85K on this car, just hope its not going to be too much expense…

 

They can be expensive if someone else does your work. Where is the car located? Somewhere warm since you are using the A/C in December?

Did all this happen all at once?

 

lol, I live in Daytona Florida, its around 80-81F,pretty crazy for decenber!!, they all came at the same time I think... i have no idea if the AC is related to any of these codes!!...

 

The A/C may be related, not sure. I know on my 2005 T5 if I goose it hard the A/C compressor cuts out and the incoming air gets warm. I understand why the ECM would cut power to the compressor when I am asking for full power.

Since all the codes happened at once I'd look for any broken wires or loose connectors. Then I'd look at getting some MAF cleaner and spraying down the MAF. Just for grins I'd clean the Electronic Throttle Control (2004.5 has them yes?) with the MAF spray cleaner and an old toothbrush. Then I'd clear the codes to see how that worked.

Having 3 seemingly independent codes pop up makes me think there is something going on with wiring that I need to find.

 

Your problem is the 15 amp fuse in slot F35 is blown. I had the same problem with my 2004.5 S40 and it made no sense that unrelated codes would occur at the same time. Also, 1 year ago I had a problem with the A/C compressor locking up and blowing a fuse, there is check engine stuff running on that circuit as well, fixed the A/C compressor and all check engine problems were gone forever. Hope this helps and isn't too late.

 

Having same problem in my 2007 2.4i V50 (non turbo) -- 5,6 codes appearing. Replaced some sensors (MAF, EVAP Purge Valve) no change, codes came back. Checked Fuse 35 as Falco says and, BINGO, it was blown. Erased codes and have not come back, yet. I am experiencing some AC Problems too.

 

If you have the AC problem where on very hot days the AC will blow cold for awhile then suddenly go warm for awhile then go back to cold (and repeat ad nauseam). Then look to the deshimming procedure. This is a simple fix to remove one of the 3 shims from the compressor clutch in order to move the clutch faces closer together. Do a search on this website for more details.