2001 Buick LeSabre "check engine light code p0135" Questions

...engine soon light on...P0135 and P0141 codes for O2 sensors.....why now?...why both at same time?...loose connections caused by mechanic that worked on transmission? possibly ...

...P0135 is a fault code for the o2 sensor before the catalytic converter.Replace the o2 sensor and then reset the computer and it should be fine afterwards.The check engine light should stay off

...check engine light on on Codes P0773 and P0135?  P0135 indicates that the heated oxygen sensor 1 on bank 1 is not functioning properly.P0773This is the torque converter lockup solenoid. Is ...

check engine light" indicator: Code P0135, O2 Sensor Heater, Circuit Malfunction, (Bank 1, Sensor 1). Is this something I can fix on my own? I believe mcalkins3 is in error...from what I can find out,

...THAT I INSTALLED CAR RUNS FINE EXCEPT CHECK ENGINE LIGHT KEEPS COMING ON. P0134- O2 sensor Circ, bank 1, Sensor 1 no activity detected P0135- O2 sensor heater circ, bank 1 sensor 1 ...

...check engine light goes off when I restart the car. The light will never come on as long as the engine is running. I have run the car for nearly 3 hours it never comes on but when I switch off and ...

codes: P0573, P0443, P0141, P0135, P0102, P0054, P0053, P0036, P0030. What do these codes mean? https://www.engine-light-help.com/chevy-check-engine-light .html This should help

...check engine light with code P0135. So I replaced a sensor ''ensor located before catalytic converter'' After driving little bit the same code came back again. What shold I do next ? Do I need to ...

Check engine light on, 1997 cadillac Deville.PCM codes Codes are P0135 and P0404. PO135 is oxygen sensor Bank1 sensor1. PO404 is EGR. personally, I'd pull EGR off, clean pintle good with throttle body

check engine light on with two codes P01131 and P0135. I change the o2 sensor in bank 1 sensor 1 and that has not helped. Dont know what to do. Any suggestions on what to do?? it is not always the 02 ...