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2001 Hyundai Elantra Question: how many o2 senors does this car have

 

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constef, 2.0L 4 Cylinder, Milwaukee, WI, February 26, 2012, 08:01
 Rookie

I had an o2 sensor a exhaust part repaired and the check engine light still comes back on
. i need to have a emission test done on it and i can't while the check engine light is on . can you please help me out.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, February 26, 2012, 08:51
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     Master

    There are two sensors a front and a rear.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
    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

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    constef, February 27, 2012, 05:56
     Rookie

    thanks so much I will try that.

    Connie

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