You have a missfire in the motor and raw fuel is contaminating the cat converter. Get it checked out before you damage the cat and require replacing it.
Saturday, February 23rd, 2013 AT 8:41 PM
I have a 2004 srx with the same problem I've scan the code and got p301 also I know that that mean misfire cylinder 1 I've tested the all coils and found cylinder 3 open what do I do next I don't want to was money on this I have also replaced both down stream o2 senors about two months ago
Saturday, July 1st, 2017 AT 5:33 PM
Yep this is not a o2 sensor problem at all. Replace the open coil which will cause the problem. When a cylinder misfires it causes the system to go lean which the computer will richen up causing the rotten egg smell.