P1505 Idle Air Control Valve Opening Coil Voltage Low.
P1507 Idle Air Control Valve Closing Coil Voltage Low.
I don't have a listing for the other codes. Since you described it as "it sounds like it's forcing" Have you checked the catalytic converter to see if it is plugging? As far as the two codes I listed, that would cause an issue with your idle.
Tuesday, July 23rd, 2013 AT 4:57 PM