About two weeks ago, the CEL came ON and car start to shake when stopping or slowing down. I did the diagnostic testing and it shows cylinder 2,4,6 misfire along with a code p1150. I bought three ignition coil and replaced them, i also checked the spark plugs and they all look fine. After replacing the ignition coil, I cleared the CEL code and did a test drive for about two miles. The car started to shake again when stopping with the CEL flashing.

I also noticed that the catalytic converter glowing red, I suspected this could be due to the misfire, unburned fuel getting in there. Please help as to what I need to check next. Do i need to change the catalytic converter? Also in the past couple of years, I replaced the ignition coil about 3 times. Could it be something else causing the cylinder to misfire? Help please, I would really appreciate it.

 

P1150 is a Bank 2 Sensor 1 AF sensor fault... It is likely that this sensor is bad, causing the fuel trim to be out of spec causing a misfire on that bank of cylinders... Get a scan tool with data list capabilities and see what the fuel trim is on Bank 2...