First of all, it has to have both sensors installed. One being gone will cause a light.
Second, they may have gutted or installed an aftermarket cat which rarely work because there is not enough precious metals.
We would also like the code numbers for the failure as well.
And finally, they are right about the high NOX. In most cases, it is the converter that is not doing its job.
Saturday, May 12th, 2012 AT 1:34 AM