Pontiac Repair: 1996 pontiac grand prix, pontiac grand prix, emissions testing

Question
What can be the problem why my emissions testing are not passing and the problem is the results tell you its PO 141 and PO 300 knowing the facts are that it's the heat senors and the spark plugs.

Answer
The 2 codes you gare getting are more then likely not related. the 300 is for a misfire which could be a bad spark plug or plug wire(S) the 141 is a heater code for the heated oxygen sensor it could be a burnt out fuse wiring issue to the sensor or as simple as a bad sensor. without seeing it I can't tell you exactly what's wrong with it but if the emission light is on it will fail an emissions test in any state that has emissions testing. good luck :)