Troubleshooting PO141 on 2001 Toyota RAV4

My check enjine light came was tested and the definition that cam up was Definition Heated owygen sensor - Bank 1 Sensor 2 (HO2S12) heater circuit malfunction Probable cause 1. - Open or short circuit condition 2. - Poor electrical connection 3. - EFI relay fault 4. - Faulty HO2S12 (Bank 1 Sensor2) Not knowing much about cars I really do not know what my next step should be. In the past Bank 2 Sensor 2 Bank 2 Sensor 1 Have been replaced. First one causting $308. Second causting $280. I really can barely afford this AGAIN ! Any suggestions would help ! Thank You ! Cindy

by in Gary, IN on December 07, 2010
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1 answer
ANSWER by , December 07, 2010
go to an aftermarket shop. you can get a o2 sensor for a lot less than the dealer. it is more than likely a bad sensor. the 12 volt source must be verified, resistance across the o2 itself and the computer must be verified. Roy