02 sensor
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Joined: Nov 2004
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From: dickson tn.
02 sensor
okay guys maybe in wrong place but i need help.i got 4 codes coming up and they are showing all something to do with the 02 sensor now my question is is there four sensors or only one the codes are po135 02sensor bank1;po141 02sensor bank1 sen2;po155 02sensorbank2 sen1:and po161 02sensor bank2 sen2 any help please all this is from our fine certified gm dealers i just sunk 1200 dollars in new intake valve cover and trans gasket and o ring and drive belt and all new fluids and i am pissed right now....please help any body..
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There are 4 sensors, its an OBDII car. Before and after the cats on each side.
Likely not all 4 failed though, I would check connectors and get a tester to see which ones are working before buying 4 brand new sensors, that would be too expensive. Testers are sold in MAD/Ecklers, etc.
My bet is that one has failed and it makes the ECM adjust the A/F enough that the whole system is confused.
Likely not all 4 failed though, I would check connectors and get a tester to see which ones are working before buying 4 brand new sensors, that would be too expensive. Testers are sold in MAD/Ecklers, etc.
My bet is that one has failed and it makes the ECM adjust the A/F enough that the whole system is confused.
Thread Starter
Instructor
Joined: Nov 2004
Posts: 221
Likes: 0
From: dickson tn.
Originally Posted by vader86
There are 4 sensors, its an OBDII car. Before and after the cats on each side.
Likely not all 4 failed though, I would check connectors and get a tester to see which ones are working before buying 4 brand new sensors, that would be too expensive. Testers are sold in MAD/Ecklers, etc.
My bet is that one has failed and it makes the ECM adjust the A/F enough that the whole system is confused.
Likely not all 4 failed though, I would check connectors and get a tester to see which ones are working before buying 4 brand new sensors, that would be too expensive. Testers are sold in MAD/Ecklers, etc.
My bet is that one has failed and it makes the ECM adjust the A/F enough that the whole system is confused.
