FAST96Z

i was driving home from work today and the car bucked then ses light was blinking then stopped drove the car fine i let off the gas backfires (sometimes)
ses light stays on all the time when i get the misfire the ses light blinks went to autozone and came up with 2 codes
P0154 insufficient activity sensor 1 bank 2
P0300 cylinder misfire
i have read what it could be just seeing if maybe this has happen to anyone if so what was it thanks
ERIC

powerslide350

blinking ses is a misfire. How old is the ignition system, i.e. opti, plugs, wires, coil?

Injuneer

The GM code listing show P0154 indicates "B2S1 (passenger side/precat) Heated O2 sensor circuit no activity", and the strategy description shows "circuit continuity detects an O2 circuit open". In other words, either the wire is bad (do you have extensions?) or the O2 sensor is deceased.

Swap the two precat sensors side to side. If the code follows the sensor (P0140) its a faulty sensor. If the problem stays on Bank 2, its a faulty wire.

FAST96Z

plugs wires like a year or 5000 miles opti had car since 2001 never changed opti or coil and i have o2 extensions and no rear o2s

Injuneer

The P0154 code is strictly related to the O2 sensor. It may cause misfires, since the A/F ratio gets screwed up on that side of the engine. Its not an Opti problem, a coil problem, a plug or wire problem. Its an O2 sensor problem. The misfire can be related to all the above, but fix the O2 sensor first.

FAST96Z

ok i will whats a good 02 sensor to get

Injuneer

Use only the AC/Delco OEM replacements. Shoebox has the part # on his website. They will be cheaper from someone like Jason Cromer. Shoebox also has his contact info on his site.

http://shbox.com/1/4th_gen_tech1.html

But before you start playing parts replacement roulette.... do the test I suggested to determine if its the sensor or the wire.

FAST96Z

ok ty ill let u know how i make out