My 2002 Mercury Cougar has black smoke coming out the tail pipe when idle at times and when accelerate hard service engine light is on code reads po401 replace 02 sensor down stream @ back of car it don't run rough at all.
mercury cougar black smoke problem on 2002 Mercury Cougar
1 answerMarch 28, 2014
2 answersJuly 10, 2010
2 answersOctober 05, 2009
1 answerFebruary 23, 2009
This week's top 10
Recent Mercury Cougar Questions
- Drivers side door will not open from the inside have to roll down window and ope
- AC and heat are not blowing st all checked fuse good. Can't hear fan no odor
- 4.6 97 couger, , had a clogged catalytic converter I cut off , runs worse
- location of turn signal switch
- Having problem with turn signals. All fuses cked. Have lights .