Questions & Answers for: Mercury Cougar p0420

1999 cougar diagnostic code p0430 and p0420 I have a 1999 cougar 2.5 litre I have 2 codes po430 and p0420 the car is using alot of fuel, what will cause this. Thank you. Willie Failed or faulty oxygen

I have a 1999 cougar 2.5 litre with two diagnostic codes p0420 and p0430 the care is using alot of fuel, what could the problem be. Thanks. Willie code po420=catalyst system efficiency below threshold

1999 cougar two diagnostic codes p0430 and po420 My 1999 cougar 2.5 litre has two diagnostic codes p0420 and p0430 the car is using alot of fuel. What could be causing this. Thank you. Willie if you ...

99 mercury cougar wont idol until car is warm p0420 codes came up i have a 99 mercury cougar it is fairly cold and the when i go to start the car in teh morning it starts fine and idols fine but about

my 99 cougar is running lean and has 5 error codes po171 p1131 p1151 p0420 p0174 i read the chart but dont no what they are or what the problem is ?? help check the car for vacuum leak or leaks,all ...

2000 Mercury Cougar 2.5l V6 with following fault codes: P0304, P0136, P0156, P0420, P0430, P1131, P1151, P0505. Car was throwing cat con fault. I removed the converter. Idle Air Control valve was also

tengo el codigo P0420. que es lo que tengo que hacer en este caso, es mucho problema ese codigo. Lo más fácil que hacer primero es un control visual de las cosas. Inspeccione ...

engine light stays on, code is p0420 low thresh bank 1.... where is bank 1 located I'm not sure you understand the difinition of OBD2 fault code P0420, it means that Catalytic converter in the ...

...po420 po306 for mercury cougar 1999 P0430 code is(catalyst efficiency below threshold on bank 2)P0420 code is((catalyst efficiency below threshold on bank 1)P0306 code is(cylinder 6 misfire ...