95gtdude New Member May 18, 2005 96 0 0 anywhere the military takes me Jan 31, 2008 #21 Jan 31, 2008 #21 HISSIN50 said: 172 is a system lean code and 412 is a code for being unable to control the idle. A vac leak can create both issues. If one only has a lean code from one O2, I'd switch the O2's, clear the code and see if the code follows that particular O2. Click to expand... I get all three codes
HISSIN50 said: 172 is a system lean code and 412 is a code for being unable to control the idle. A vac leak can create both issues. If one only has a lean code from one O2, I'd switch the O2's, clear the code and see if the code follows that particular O2. Click to expand... I get all three codes