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changed O2 sensor and engine light won't go out....help!

This is a discussion on changed O2 sensor and engine light won't go out....help! within the Technical / Maintenance forums, part of the General Discussion category; ok getting pissy with this thing. 2001 tahoe 5.3 engine...4x4, auto...etc... its had check engine light on for a few ...

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    changed O2 sensor and engine light won't go out....help!


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    ok getting pissy with this thing. 2001 tahoe 5.3 engine...4x4, auto...etc...
    its had check engine light on for a few months now and i finally got around to checking it and it was the bank one sensor one O2 sensor code...and that was the only code in there...so i changed it out, had the battery unhooked for oh 30 minutes or so while i was changing it hooked it all back up, and i have drove it for about 20-30 miles and the light is still on...???

    i changed one of these same O2 sensors out in my 99 silverado 5.3 and when i hooked all back up and drove it for a little bit the the light went out on its own...and all is well....

    so tell me do i have to get this silly computer flashed to clear the code out??? on an 01 vehicle? or whats the deal????
    04 Chevrolet Silverado 5.3 2wd
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    Bow Down Justin_Inc's Avatar
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    Re: changed O2 sensor and engine light won't go out....help!

    unhook the battery over night, that'll clear the memcal in the ecm, hook it up, if the light comes back on in 150 miles that means you didnt fix the issue.
    **Flat Broke Racing**

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    Re: changed O2 sensor and engine light won't go out....help!

    Codes cannot be cleared on OBD2 without a scanner. Have the code read and cleared.
    Last edited by redvett01; 12-18-2010 at 11:48 AM.
    04 K1500 Silverado EXT 3:73 gears, 5.3L 265/75-16,Pace Edwards tonneau,

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    2nd Amendment Supporter mudbuddy's Avatar
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    Re: changed O2 sensor and engine light won't go out....help!

    Quote Originally Posted by redvett01 View Post
    Codes cannot be cleared on OBD2 without a scanner. Have the code read and cleared.
    ^X2 funny how guys are still telling people to unhook the battery.
    Last edited by mudbuddy; 12-18-2010 at 12:47 PM.

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    Re: changed O2 sensor and engine light won't go out....help!

    light went out on its own after a half days driving.....nice. on day two now and light still out.
    04 Chevrolet Silverado 5.3 2wd
    1966 chevy fleetside 283 v8
    1967 camaro rs/ss 396

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    FSC Midwest Chapter TonkaMechLB7's Avatar
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    Re: changed O2 sensor and engine light won't go out....help!

    It has to run a number of engine cycles not reading the code and it will correct itself. From what I gather in other places.

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    Re: changed O2 sensor and engine light won't go out....help!

    After any repair on OBD2 vehicles your supposed to clear the codes but if the repair is successful the PCM will turn off the SES light. The history codes will remain until cleared with a scanner.
    04 K1500 Silverado EXT 3:73 gears, 5.3L 265/75-16,Pace Edwards tonneau,

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    Bow Down Justin_Inc's Avatar
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    Re: changed O2 sensor and engine light won't go out....help!

    Quote Originally Posted by mudbuddy View Post
    ^X2 funny how guys are still telling people to unhook the battery.
    unhooking the battery on OBDII vehicles does work, but its not a 20min procedure like with OBD vehicles. 24+ hours are needed. try it one time. Do it long enough and sometimes you even have to reset the VATS system for it to start again.
    **Flat Broke Racing**

    1989 Chevy RCSB Stepside, 427 LSX block, PT106 turbo, Lenko 6spd Manual, Moser M9 rear, tube chassis, full cage, NBS front clip, rear step shavers, Zo6 seats, A/C, 1050hp street tune and daily drivable!

 

 

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