O2 Sensor: Bank 1, Sensor 2 - Page 2 - Hyundai Forums : Hyundai Forum
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#11 Old 04-02-2012, 12:24 AM
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Originally Posted by bikerguy951 View Post
HMR1979,

Thank you so much for your posts and sharing that wiring diagram. They were all very helpful. I have the same OBD2 code, so I am following in your footsteps and will be ordering from fourgreenautoparts shortly.

I just wanted to see if everything worked out okay and your check engine light disappeared. And if there are any gotchas I should look out for.

Thanks again!
No problem, that's the beauty of the internet.
Yes, code went off. I disconnected the battery while doing the exchange. Left the battery off for about 30 minutes; code went off after.

If you are replacing the same exact one as my problem - part number ending in 200 I believe, it's an easy switch compared to the other sensors.

Just make sure you have the same length of wire (if it's not the same length, you will know you got the wrong one). I suggest you change it from the top (the harness connector first) then drop the actual sensor to screw in the hole at the bottom of the car. Unless you have someone that can fish you sensor down to you.

Make sure to have a jack stand because you will be going under the car; I wouldn't risk it with just the jack.

I did have trouble trying to unhook the plug from the top - it's just a plastic clip, just make sure not to break anything.

Oh, also a Hyundai tech suggested that I do this: do this in the morning when the engine is cold. Start the car cold, rev till 2,000-3,000 for 20 secs or so then turn it off. That should make it easier to unscrew the sensor.

Let me know how it works out for you.
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#12 Old 07-25-2012, 04:37 PM
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flyboy480
hey there hmr1979
Was the bank 1 sensor 2, the one you figured out. Post cat RH side??

I got a Veracruz with same code that says same thing bank1 sensor 2. P0037

Last edited by flyboy480; 07-25-2012 at 04:39 PM. Reason: incomplete
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#13 Old 08-02-2012, 07:26 PM
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Hi,
I am having the same problem with My 2006 Sonata LX, engine light. I searched eBay found the seller (fourgreenautoparts) listing the oxygen sensor. My code came up as 0037 (bank 1 sensor 2) but I am not sot sure which part to order. There is a rear right sensor and a rear left sensor on bank 1 and 2, respectively. Is the bank 1 sensor 2 located on the right side of the vehicle when facing the front of the vehicle or the left?
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#14 Old 08-03-2012, 10:28 AM
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After further research, I found some information distinguishing between right & left sides pertaining to oxygen sensor location. While sitting in the driver's seat of the vehicle, the passenger side (your right hand side) would be considered the right side (Bank 1). The driver's side is considered the left side (Bank 2). The OBD code I have for my Sonata is P0037 = Bank 1 Sensor 2, replacement part description would be oxygen sensor rear right if the information is accurate (downstream - after the CAT converter). As a second check I contacted the Hyundai parts dealer & provided a description of the code (Bank 1 Sensor 2) + the vehicle VIN #, they confirmed the part to be #39210-3c200 which is the rear right oxygen sensor. Now I need to confirm the physical location of the oxygen sensor.

Last edited by sonataLX; 08-03-2012 at 10:38 AM.
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#15 Old 08-13-2012, 11:58 AM
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Follow-up.
The right rear oxygen sensor (bank 1 sensor 2) is located on the right side of the vehicle when sitting in the driver’s seat (left side of the vehicle when facing the front of the car). The sensor is located post the catalytic converter in bank 1 & is easily accessible (bank 1 is the side close to the firewall - used 2 jack stands to support the vehicle). As hmr1979 mentioned in an earlier post, run the vehicle for approximately 20 seconds before removing the O2 sensor & then disconnect the battery ( I disconnected the negative terminal). I did not have the right size wrench for the O2 sensor but was able to remove it quite easily with an adjustable wrench. I have read that the vehicle has 2 catalytic converters, one for bank 1 & the other for bank 2. While underneath the vehicle, I was able to identify both right & left rear O2 sensors (banks 1 & 2) both are easily accessible. Both front bank 1 and bank 2 sensors are also easily accessible; they sit on top of the engine, bank 1 by the firewall and bank 2 by the radiator. Also, the replacement part I ordered (thanks to the tip from hmr1979) from Fourgreenautoparts was the exact OEM. I received the replacement OEM O2 sensor in 2 days. A mechanic I know mentioned that O2 sensors are color coded. The replacement part I ordered did have a color coded blue ribbon around the wire which matched the original O2 sensor I had removed ( it also had a color coded blue ribbon).


So far the car is running great, no engine light. Thank you everyone!

Last edited by sonataLX; 08-13-2012 at 12:07 PM.
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