2001 Volvo S40 Check Engine Light

I think you need to get more info on the "Hub", do they mean the hub bearing on the front or back wheel? Or the hub spindle assembly? A hub bearing could be done way cheaper at a good auto shop, your dealer seems to over inflate his rates! Please call them and find out more info about what they are refering to?

If they replaced the cam shaft reset valve and the same code has come back for a timing issue, then I am assuming they are talking about the Variable Valve Timing Unit hub assemly. This repair is pretty expensive and AllData shows 4.4 hours to do. Depending on what the dealer is charging lets assume it is $145 because that is what high end dealers are actually charging this days but just guessing that is what they are charging you, thats $638 just in the labor not including the hub. At this point you may want to try another shop to verify it is the hub that is bad or not? Have them check that the timing belt has not slipped causing incorrect ignition timing and you may want to have them check the cam sensor for any damage? If all that is good then you will need the Variable Valve Timing Unit hub replaced. At this point if you have not had a timing belt done, have them replace it also along with the tenioner and idler since they are already in and the timing belt has to come off.