Oxygen sensors (Air fuel ratio sensors) are a common problem on many vehicles. A P1155 or P1135 code indicates you have a bad sensor. This is common in Toyota and Lexus cars and trucks. Learn how to test the air fuel ratio sensor to see if it is bad, and then learn how to replace the bad sensor.
Nice O2 Sensor Socket Kit: http://www.amazon.com/gp/product/B005SMUORO/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B005SMUORO&linkCode=as2&tag=chri0e2-20&linkId=Y3D4ZF62DSRUJ3CT
OBD2 Scanner to get the codes: http://www.amazon.com/gp/product/B00652G4TS/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00652G4TS&linkCode=as2&tag=chri0e2-20&linkId=VBOTJXMIWC2MKTZ2
Multimeter I used: http://www.amazon.com/gp/product/B001O1X65A/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B001O1X65A&linkCode=as2&tag=chri0e2-20&linkId=SCFDOB4EFQYDCZR2
Here is where to get inexpensive A/F Ratio Sensors: http://www.amazon.com/s/?_encoding=UTF8&camp=1789&creative=390957&field-keywords=air%20fuel%20ratio%20sensor&linkCode=ur2&sprefix=air%20fuel%20ratio%20s%2Cautomotive&tag=chri0e2-20&url=search-alias%3Dautomotive&linkId=7R4JTUCKCJQBTOSV
Some background info on difference of Oxygen Sensors and Air/Fuel Ratio Sensors. What distinguishes Air Fuel Ratio Sensors from regular O2 sensors is that the AFR Sensor is what is known as a wide range O2 sensor whereas the basic O2 sensor is a narrow range sensor. It can detect a wider range of air/fuel ratios than the basic O2 sensor. Also, the AFR Sensor has a little bit more circuity to enable it to detect more minute variations in the exhaust system air content (more sensitive than the O2 sensor). Therefore, it is able to make better adjustments through the ECM to add or subtract fuel to produce a better mix of air/fuel to maximize efficiency and minimize emissions.
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Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.