Resetting P0171 code.
Hello everyone. I have a 2000 S40, 181K miles on it. I have a MAF sensor code of P0101, and a a fuel trim code of P0171. Car running poorly, not starting. I know that my replacement of my MAF sensor (which I will be doing in the next 7 days) may clear up the condition that caused the fuel trim code to come up (it should eliminate the P0101 code), but I have read that after I remedy the condition that caused the fuel trim code to come up that I need to RESET the fuel trim. I do not know how to reset the fuel trim. My VADIS says that I can use a VCT2000 to do it, which I understand is a computer product to read and clear codes from the ECM. However, I have an OBD II scanner that I used to pull the codes that I have. Can I use the OBD II to clear the fuel trim code (the P0171)? When I clear that code on the OBD II, does that "reset" it? Or do I have to go to something like the VCT2000 to "reset" it? Thanks for reading this. Chris