Air21

Having problems with my 02's again. I had installed Dynatchs with a cutsom Y last year. I used ls1edit to re program the computer to get rid of the codes. The GM dealer had replaced the computer due to irratitic running. I had got the ls1edit retuned to the new computer now i am having other 02 issues. I have replaced the 02's with 2 new GM units.

P0140 H02S Circiut insufficient Activity Bank 1 Sensor
P0160 H02S Circiut insufficient Activity Bank 2 Sensor
Theese are the rear aftercat o2's NO?

P1133 H02S Insufficient Switching Bank1 Sensor 1
THis is the new code i am getting, whats this all about?

NoGo

iTrader: (2)

Those codes are for the O2's after the cats. Usually those codes are indicative of a dead O2, or not powered O2.

The insufficient switching is caused by your LT headers.

Personally, being you have edit, I would save myself the headache, and block the rear O2 sensors and turn off the codes for the forward O2 sensors.

If you really find yourself hating the O2 sensor kick you car to open loop and remove all of them entirely.

Good Luck

Air21

yeah i turned off the rear o2's and set the other p1133 code so it doesnt throw. I'll turn it off fully now that i know its cause of the lt's. Thanks for the help.