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have 99 gs 300 I took the Advanced auto part store for check engin lite they told me that I need oxygen sensor port one i did put new Denso in a couple hours check engin light come back again what causes of this thanks for help
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Are you sure the right sensor was replaced and that the part is correct. I was just looking today at an "Oxygen sensor" application for a Toyota/Lexus, the part was different for a California specification vehicle and they also needed to know if the vehicle was Japaneses or US assembled (VIN # tells you that). Oxygen sensors are identified by bank and sensor position. Sensor 1 is always pre catalytic converter, sensor two is always post catalytic converter. If an engine is a 4 or 6 cylinder engine the whole engine is considered bank 1, if an engine is a V6, V8, V10....., the engine bank containing cylinder number 1 (first cylinder in the firing order) is considered Bank 1, the other bank is considered Bank 2. Interpretation Oxygen sensor designation B2S1 refers to Bank 2 Sensor 1, it will be the sensor on the engine side of the catalytic converter in bank two. Check this link to determine the cylinder that contains cylinder number 1. http://www.wellsve.com/custom_searches/ds_firing.php Perhaps the o2 sensor heater circuit is not getting power if so you have to follow a wiring diagram and look at fuses. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online
Hi ,Thanks for answer yes per advance auto part oxygen sensor bank one Denso 234-4048 part is correct same as original not sure if they all the same thanks