[pegasus757]

when a car first starts up it is in open loop (meaning the car is running rich during the warm up period,) after that it goes into closed loop . in closed loop the car has the perfict air to fuel ratio. may need new thermostat ortemp sensor . code 43 is also ignition coil, code 11 is also for camshaft and crankshaft sensor.. this is what you need to do 1) disconnect battery for 15sec.(clear codes) 2) connect battery and run car in the drive way at about 2000 rpms (hopefully it will die out on you). 3) read codes again . you will get 12 because you diconnected the battery and 15 because at 2000 rpms the car thinks its driving down the street. forget 12,and 15 . 4) post results