Last year I installed 94016 high flow cats (along with gotts mod), and now a year later the engine light is on. The SCT programmer showed that it was bank 2.

What can I do to turn the light off?

 

did you get the code?

double check everything is plugged in and no wires have come lose or rubbed up against the exhaust/headers which would melt the connections

 

Post the actual code.

 

x2, actual code please. How many miles?

Why did you do the Gotts O2 mod? Did you install it direct after cat and have a CEL after install?

 

He didn't say gotts 02 or gotts intake mod either so he needs to specify that too. Hard to help when the OP gives vague information.

 

the code is P0430(catalyst system eff. below threshold B2)

-it is the gotts intake mod, sorry didnt know there was a gotts o2

-When the cats were installed the guy who installed it put a bung in the cat so that the 02 sensor would reach. I never had the CEL show until now. The high flow cats have been on for about 15000 miles.

 

The light actually went off for a couple of days but for the past week it has stayed on