1997 pontiac grand am 2.4l
Dear JK:Had miss fire problem first, replacing the ignition
parts fixed problem.But, cat went bad.Replaced cat and front and rear
o2 sensors.Then gas cap for evap leak.Now have a p0420 code.Is it the
cat or rear o2 sensor? or something else? mass airflow or map sensor?
Thanks for your help,if you could respond soon it would really help
me.Because I think the shop that replaced the cat is trying to get out of
warranty. Thanks
JK:
Hello and welcome. Since you seem to be in a bind, i will help now. We were all taking a
break for a while, its been busy. P0420 is cut and dry 'cat. converter Inefficient' 99% of the
time it IS the converter. Have only had 1 bad post cat. o2 sensor cause this in the last 10
years. If the post cat. o2 is bad, it will set a code for 02 sensor, not usually catalytic
Inefficient.
Back
Dear JK:Had miss fire problem first, replacing the ignition
parts fixed problem.But, cat went bad.Replaced cat and front and rear
o2 sensors.Then gas cap for evap leak.Now have a p0420 code.Is it the
cat or rear o2 sensor? or something else? mass airflow or map sensor?
Thanks for your help,if you could respond soon it would really help
me.Because I think the shop that replaced the cat is trying to get out of
warranty. Thanks
JK:
Hello and welcome. Since you seem to be in a bind, i will help now. We were all taking a
break for a while, its been busy. P0420 is cut and dry 'cat. converter Inefficient' 99% of the
time it IS the converter. Have only had 1 bad post cat. o2 sensor cause this in the last 10
years. If the post cat. o2 is bad, it will set a code for 02 sensor, not usually catalytic
Inefficient.
Back
| Was this information helpful? Is this what you have been searching for? Why not make a small donation to help keep us going. The guys work hard everyday to try and help people like you searching for help on the web. LEARN HOW |
Other related articles:
Other related questions