I installed the catted downpipe from Whoosh, and it caused a check engine light for p0420, which is catalytic efficiency. I then bought the CEL defouler from Whoosh, and had it installed last week. The CEL didn't come back on after it was cleared during the defouler installation, but then it came back on over the weekend.
Any idea what might be going on? Did they not install it correctly? They didn't use all the parts that came with the defouler, there are two small open ended cylinders/sleeves/spacers left over.
Thanks in advance.
Any idea what might be going on? Did they not install it correctly? They didn't use all the parts that came with the defouler, there are two small open ended cylinders/sleeves/spacers left over.
Thanks in advance.