Replace O2 sensor still has serv. eng. soon

[ace883]

Ok guys, I replaced the O2 sensor and pulled the battery cable for 30 seconds and hooked it all back up and the service engine soon light is still on. I heard you have to cycle the engine so many times before it will clear itself, is there any truth to this, should I take it back to autozone and have it checked again......Thanks in advance

[GTP Dad]

Take it back and have it scanned again, if there is nothing wrong they can reset the computer for you and turn out the CEL.

[Timber492]

Ya, unless you have a really old car, you can't just take the batt. off to clear the codes. You most likely have a OBDII in your car, which requires you to have it scanned and cleared by the tool only! Hope that helps...Good Luck!

[justin0717]

no OBDII can be cleared by d/c the battery

[Timber492]

Justin, what was it that you were trying to say? Do you agree that the OBDII can not be cleared or are you saying that it can be cleared by D/C the Batt?

[justin0717]

OBDII codes can be cleared by d/c the battery....most of them anyways. Some stay on, such as a misfire, or other important codes, but if d/c the battery, it should clear an o2 code. You have to leave it off for more than 30 sec, try a few min.

Also the problem may not even have been fixed. Have it scanned and then have them clear it, or d/c the battery for a few min and see if it comes back.

[wafrederick]

Did you fill the gas tank really full?That will set the service engine light on. Do over fill the gas tank,when the pump stops,stop at there.I heard this from a Vetronix rep that my father knows.My grandma had the service engine light and the oxygen sensors were replaced until found she topped of the gas