got p0137 and p0157 after i got my high flow cats put on only had the p0157 code before any ideas

got codes again any one know y?

 

What kind of cats are they? Those codes are for sensor 2 low voltage signals, which means that the sensors are seeing too much O2. You may have exhaust leaks, bad sensors, or it just may be a characteristic of the aftermarket cats. Since they're post cat sensors that are tripping the codes, you could just delete the rear O2 sensor tests and codes and be good to go.

 

magnaflow cats thats what i was thinking i should do any way is just delete them but i just wanted 2 know what was goin on