Question about 2005 Hyundai Elantra
Bank 1 sensor 2 wich one is that ?
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Posted on Jan 02, 2017
there is two wires then suposed to be same color they are not what you looking for but if you have a grey and a black wires it willl be one of those i hope and this help
Posted on Jun 20, 2008
You need to check two things.
First, there is a heat shield on top of the front of the motor where the o2 sensor you already replaced is. It's got (4) 12mm bolts. Remove it and check the exhaust manifold (big thing you put the o2 sensor into) for cracks. If there are any cracks, you'll get o2 sensor codes. Replace the manifold.
Second, if the manifold is fine start the car and listen to the exhaust pipe under the engine for leaks. Or if you already know the exhaust is loud... that's gonna do it too. A leaking exhaust pipe on an Accent will set secondary o2 sensor codes.
SHOULD you try to change it yourself, you will need a 7/8" wrench, and a new o2 sensor, or flex pipe, or manifold depending on what's broke. Do NOT touch the tip of the new or old o2 sensor to ANYTHING when you take it out or install it or it will be ruined permanently. Run the car until it's at it's normal operating temperature. Raise the vehicle, and take the o2 sensor out of the car (see below to understand which one) using the 7/8" wrench or if you got fancy and bought an 02 sensor tool... use it.
Replace whatever parts are bad (manifold or pipe) or just replace the sensor you need. Then restart the car and take it to a parts store and have them clear the code. The code (and check engine light) won't return right away, it usually takes a few days. If you did everything right you should be good. If not, it's not a terribly expensive job to have done and by now you should be able to explain to them what's wrong based on what you found when you looked at the car. Just tell them everything you checked and what you saw.
Education: I'm not sure where that half baked answer about o2 sensor 1 being near cylinder one came from but here's the real deal.
Sensor 1 is always BEFORE the catalytic converter
Sensor 2 is always AFTER the catalytic converter
Bank 1 and Bank 2 refer to which SIDE of the exhaust on 6 and 8 cylinder engines. Bank 1 is usually left side, Bank 2 is usually right side.
So... O2 sensor B1S1 refers to the O2 sensor BEFORE the converter on the LEFT side of the motor.
Posted on Nov 23, 2009
The bank has to do with which side of the engine. The 'Sensor 1' indicates that it is upstream of the catalytic converter.
Heated Oxygen Sensor Removal & Installation Heated Oxygen Sensor (Front) (2.4L)
Heated Oxygen Sensor (Rear) (2.4L)
Heated Oxygen Sensor (Bank 1/Sensor 1) (3.3L)
Heated Oxygen Sensor (Bank 1/Sensor 2) (3.3L)
Heated Oxygen Sensor (Bank 2/Sensor 1) (3.3L)
Heated Oxygen Sensor (Bank 2/Sensor 2) (3.3L)
Posted on Jan 13, 2011
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