P0134 and P0154 Codes

The SES lite has been on since I first started the swap. I finally got it looked at and the parts guy says I need both 02 sensors. They are brand new AC Delco's so I replaced them with two extra ones that I have. I like to have extra parts especially 02 sensors.
Code is still there after reset.

I dont have time to do a SEARCH so dont flame me, just enough time to post this.

Appreciate the help.

FYI its a Nelson harness with Camaro 02 sensors that I was told by them to use. LT headers. 02's are 1ft behind the stock 02 location provided by Schoenfield headers.

Insufficient activity. Make sure and check the power and ground to each sensor heater.

Quote:

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Originally Posted by GasGuzzler

Insufficient activity. Make sure and check the power and ground to each sensor heater.

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Ck'd voltage at the o2 connector, got 12v so I dont know what else it could be.

What would be some of the affects with these two codes??

Lazy o2, not hot enough, can you move them close.

I have the same codes but only have 0.45 volts

I had them located in the LT's and the SES light still came on.

Also when I had manifolds the SES light still came on. One manifold was an Fbody and they other was a stock 6.0 manifold

Did more of a search when I had the time and found out to use
Corvette rear o2 sensors

light hasnt come on but I havent driven it yet, only started and idled it a few times