Error Code P0031

2005 TOYOTA CAMRY
19,000 MILES • 6 CYL • 2WD • AUTOMATIC
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S LAM
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VSC, TRAC and Engine light is on when driving. OBDC shows P0031. Replace air fuel sensor with oem part 89467-06050 (after confirm that original part on veh is also 89467-06050/Denzo). Clear error codes with OBDC. VSC, TRAC, Eng lights came back on after short drive. After 2 days, tried reset by holding odometer button and turn on ignition and also clear error P0031, dash lights turned off successfully for about 20 minutes driving, but unfortunately turned on again. 5 days later, still hv same dash lights on and OBDC shows three monitor test not complete with icons flashing and gives error code P0031 twice. (only single P0031 before relacement air-fuel sensor). Replace the other air-fuel sensor located at bottom?? Thanks for help.
Jul 17, 2009 at 11:29 AM
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STEVEW84
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Which A/F sensor did you replace? The code says it is for Bank 1 Sensor 1. That would on the back of the motor on the exhaust manifold.


https://www.2carpros.com/forum/automotive_pictures/170495_o2_sensor_1.jpg

Jul 17, 2009 at 12:26 PM
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S LAM
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OMG, I replaced Bank 2 when I should have replace Bank 1. I presume Bank 1 would be the one on the front of the engine. I can kick my self. Where can I find diagrams like the one you are showing? Thank you.
Jul 17, 2009 at 12:51 PM
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STEVEW84
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Its called Alldata. I think Autozone has some thing that you can buy a subscription for one vehicle and will have good information. Not 100% sure though.
Jul 17, 2009 at 1:05 PM
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BENJAMINJOS
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I am getting a P0031 sign from the obd 2 reader. What do you think the problem is?
Sep 16, 2019 at 4:16 PM (Merged)
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HMAC300
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this is an O2 sensor or air fuel ratio sensor. the heater on it may be open . problem is you have to make sure you get the correct one or the code will set again. Because resistance can vary in these, that is the difference.
Sep 16, 2019 at 4:16 PM (Merged)
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BENJAMINJOS
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How do I know which O2 sensor is broken?
Sep 16, 2019 at 4:16 PM (Merged)
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HMAC300
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I forgot it's bank 1 sensor 1 that is the one in front of converter.
Sep 16, 2019 at 4:17 PM (Merged)
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BENJAMINJOS
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So it is in the main engine?. Where is the converter located?
Sep 16, 2019 at 4:17 PM (Merged)
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HMAC300
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Here you go. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
Image (Click to enlarge)
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Sep 16, 2019 at 4:17 PM (Merged)