SES Light-Emissions System

Replace the catalytic converter if it has a hole in it. If the light comes on after that, take it to AutoZone and have them read it. They do it for free and can usually tell you what you may need to replace.

If the light reilluminates after cat replacement, try replacing the co2 and o2(oxygen) sensor. I doubt it would be the egr but it could be and in that case if it is still under warranty its the dealership that should do this.

Also note, check your contract if you are leasing the vehicle. Replacing the catalytic converter may cause the warranty to void if a certified service tech does not do it.

__________________
Kevin Cagle

Could the problem with the Catalytic Converter been the cause of my SES light all along, and not the emmission pump which was replaced last week? Is there any relationship between these two problems?

Yes. Usually the catalytic converter will cause the ses, cel, mil lights to illuminate. If the cat is bad, the eg will back up causing other problems. If the air is moving through it to quickly, as it would with a hole, then the sensors will read you arent running lean enough. The Catalytic converter, Vacuum, and emissions show the same codes and have some of the same symptoms. IF you replaced the pump, and reset the light, then the light came back on, then replace the cat. If that doesnt keep the light off, replace the o2 sensor. If that doesnt fix it, you will need to go deeper, getting into the egr and computer.

Basically, reread the codes if same code comes up change the catalytic converter.

And yes the cat could have been the problem all along. That or a sensor. But the only way to know if it is a sensor is to replace the sensor or cat. But if a hole is in the cat then you will need to replace it anyhow before it gets water in it. When that happens you could start rusting your exhaust piping and muffler.

__________________
Kevin Cagle