David Houtchens (68.59.237.57) - Sun Nov 11 11:23:39 2007

My wife's 2000 Yukon XL 5.3 liter 4WD is giving me fits! We had a "small evap leak". when we go that fixed it gave us the PO 141 O2 Sen Heater Circ Malfunc codes for Bank 1 Sen 2 and Bank 2 Sen 2.

We've replaced the sensors, twice, and still have the code. Please tell me there's something besides a bad computer causing this. The mechanic says he recently replaced a 2003 computer w/a rebuilt for $400 versus a new one for $900.

Thanks for any tips.

Reply #1 adnan (121.52.146.253) - Sat May 24 08:28:26 2008

plz send m how to decode the sesors numbers

Reply #2 drkrobotnik (74.192.36.6) - Tue Jul 1 13:00:17 2008

hey it's not the sensor the sensor going off is a symptom of something..

it's probably a vacuum leak of some sort. something easy to fix just look around your engine and see what you can find. if you find any busted hoses, there's your problem.

Reply #3 Pasencio (71.173.249.234) - Tue Mar 10 06:38:31 2009

My car, A Chevy Malibu 1998, have problem wiz that sensor. Get PO 140 and PO141 code, but no light is on. My mechanic says this too sensors are no activated.

Please gif me your opinion to fix that problem.

Tank you,

Persio

Reply #4 monkeygirl (96.245.37.221) - Thu Sep 24 11:27:57 2009

Thanks drkrobotnik for the info. We're having the same problem:

We replaced c. Convertor and then went to get it inspected. Now the lights on. They want 153.00 for parts & labor but including Dio. charges. I'm going to try you suggestion first. Thanks for the input I found this website purely by mistake. M

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