code p0140

I recently had the problem of p0140. i was told to replace the fuse and blow out the pump to fix the problem. I did so and the service engine light turned off. It was off for about a month or so and then it came back on. I checked the problem with a scan tool and it said the same problem was back. There are two problems with the secondary air injection system just like last time. So should i do the same thing as last time or is there somwthing else i need to do? Thanks

It is very possible you need new O2 sensor. It is what I might getting lazy and not cross counting as much as it should.
But kinda wonder where you are coming from.
P0140 is HO2S Insufficient Activity Bank 1 Sensor 2

so what do i do now

I remember your post...you had a code P0410 last time, not a P0140.

P0410 = Secondary Air Injection System

P0140 = HO2S Circuit Insufficient Activity Bank 1 Sensor 2

Which do you have now....P0410 or P0140?

sorry i messed up i have code p0410 secondary air injection mal function. And another thing my positive terminal of my battery keeps getting corroded i cleaned and a month later it was corroded again. Could i have a leak in my battery?