P0031 - Help!

[tms2]

My check engine light has come on. I hade the code checked at Autozone. They told me the code was P0031 but they didn't know what caused this exactly. Does anyone know anything about this one?

Thanks,

Tim

 

[AlbNYPR5]

http://www.msprotege.com/forum/showthread.php?t=104794&highlight=p0031

 

[bubbajonr]

TMS2,
It's the upper O2 sensor. Mine did this a month ago. Get a new one, gonna be expensive and swap it out. Remove the negative battery terminal and step on the brake for a ferw minutes. This will reset the ECU. Then reconnect the negative terminal and you should be good to go.

 

[Skoozul]

Why step on the brakes? mine resets without doing that.

 

[aMaff]

check to make sure it's plugged in. That's how I fixed mine....

 

[tms2]

Thanks everyone for the help. I'll update the post after I replace the O2 sensor.

 

[tms2]

Replacement of front O2 sensor resolved the P0031 problem. Thanks for the help.

I found that the "universal" sensor was about $200 cheaper than the OEM sensor carried at AutoZone. I just had to salvage the old wiring harness.

 

[Lt. Dan]

Make sure you "weather proofed" the connection where you spliced in the harness. If you didn't, you'll just be replacing it again.....

 

[bazooka joe]

Make sure you "weather proofed" the connection where you spliced in the harness. If you didn't, you'll just be replacing it again.....

ya, the universal ones come with a pretty slick waterproof connector.

 

[Jackelope]

^ mine threw this code, O2 sensor easy to change out?

 

[Tasty]

I had this EXACT same code and problem for quite a while. Finally fixed it about two weeks ago. Bosch universal O2 sensor replacement. Despite all the negative talk about the Bosch replacements I followed the directions, did a clean install, and the code is gone! Easy fix and only about $60.

 

[Jackelope]

^ whats it hurt to ride around w/ a bad O2 sensor for a while?

 

[bazooka joe]

^ whats it hurt to ride around w/ a bad O2 sensor for a while?

you'll run rich, burn a lot more gas and can clog your cat