Replacing O2 Sensor In 2003 Santa Fe - Hyundai Forums : Hyundai Forum
 
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#1 Old 02-15-2009, 05:07 PM
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gqrilla
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Wondering if someone could give me tips on replacing the O2 sensor - bank 1, sensor 1. I've seen the posts on where to find it and have been under the hood and can feel it on the back side of the engine, but actually getting to it for removal and replacement seems tricky for a diy project.

Thanks
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#2 Old 02-17-2009, 06:06 PM
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Dear gq,

You did not mention your engine size, as the 2.4 liter 4 banger, the 2.7 liter V-6 and the 3.5 liter V-6 came in your vehicle.

But you are scaring me. The Bank 1 Sensor 1 oxygen sensor for all three engines is located on the exhaust manifold up top in front of the engine. Open the hood, look straight down at the exhaust manifold, grab the top set of wires leading to the manifold,. and trace down to the sensor. Very easy to access, just need to wait for the sensor to cool before you burn your hands. The 2.4 liter B1S1 sensor is high, the 2.7 and 3.5 liter B1S1 is down low and a reach.

Best thing to get is a special tool made by Lisle that is a special oxygen sensor socket with a slot cut down one side...for the wires. You install the socket on the sensor, lay the wires in the slot, break the torque, remove the wrench from the socket, and just unscrew the socket with O2 sensor. Very wise investment. After the engine cools, the removal and replacement takes three minutes.

Byron

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#3 Old 02-18-2009, 12:28 AM
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sorry it's a 2.7 liter v6
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#4 Old 02-18-2009, 12:30 AM
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gqrilla
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I determined which one was the right one based on Hyundai's service website. According to their description the bank1/sensor1 location is on the exhaust manifold on the dash side of the engine. This is the one o2 sensor I could not see. I could see the 2 sensors on the radiator side and the lower sensor on the dash side (from underneath) but not the top one which is the one with issues.

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#5 Old 02-19-2009, 01:00 PM
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Dear ggrila,

Sorry, you are correct that the 2.7 liter has Bank 1 as the rear bank. As shown in your diagram, where the 3 exhaust runners join to one exhaust runner (maybe 3 inches below the merge point) is the O2 sensor. You will have a difficult time to reach from either top or bottom. Removing the upper intake manifold will help to give you access from the top. What a pain.

Byron


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#6 Old 02-19-2009, 01:18 PM
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before you go any further, are you sure the sensor is faulty? as byron said this is a nasty job to do and you can easily take the skin off your knuckles and thats apart from all the swearing!!



MONTEGO

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#7 Old 02-19-2009, 06:28 PM
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gqrilla
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I'm not totally sure if the sensor is faulty. The service indicator light on the dash will come on for a few days and then shut off for a few. Seems to maybe be affected by weather change. Had a local shop scan it and came up with code P0130 and description of "O2 sensor circuit malfunction (bank 1, sensor 1)". They recommended replacing the sensor.

Any other input would be great.

Thanks
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#8 Old 02-23-2009, 02:37 PM
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Dear gg,

Just for grins, trace the wire from the B1S1 oxygen sensor back to the wiring harness, disconnect, spray both the male and female end especially the metal contacts, plug back and unplug 10 times, plug back. and try driving the car.

A P0130 could be caused by simple corrosion on the pins and holes. Cleaning the connection will fix this.

Byron

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