Found it and reset the codes as follows for those who still need help: There is a small black box under the hood on the left fender well. This box has a cover on it with a probe in a holder. Remove the probe from the cover and put it into hole #2. Turn the key on. There is a button in that black box...

Welcome to Matthew's Volvo Site. The codes are cleared using the diagnostic unit in the engine compartment. Can you tell me exactly where that would be located? Having the same problem with trying to reset my Check Engine Light and I also checked behind the cluster panel for a switch and could not ...