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I have a 2008 Hyundai santa fe and I read a p0131 on a scan tool. where is the oxygen sensor bank1 sensor?

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Code p 0131 refers to heated oxygen (HO2S) sensor 1 bank 1 ---low voltage ===causes --exhaust leak--wiring short to ground ---HO2S sensor ---ECM
the HO2s) is the sensor in the exhaust manifold before the cat converter and bank 1 is closest to the fire wall
the exhaust leak could be in the mesh covered section of the exhaust pipe from the manifold to the cat converter as they crack and that will throw out the HO2s reading back to the ECM

Posted on Apr 16, 2017

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Posted on Jan 02, 2017

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2002 santa fe 4 cyl. o2 sensors


oxygen sensor ( O2) are located after the cat converter
the one in the exhaust manifold is a heated oxygen sensor (HO2S) and is a totally different operation sensor

Apr 03, 2017 | 2002 Hyundai Santa Fe

1 Answer

Where is the 02 Oxygen Sensor before the cadalic converter on a 2006 Hyundai Santa Fe


Usually these are located on the exhaust manifold or just below the exhaust manifold and you should be able to see it in the engine bay. On V6 engines there will be one sensor on each of the 2 exhaust banks.
You will probably need to remove the engine cover to see the sensors on your exhaust.

If someone told you to replace these because you got a particular fault code I would be wary. A decent scan tool and basic diagnostics can show if the 02 sensor is working or not. Some faults often blamed on an 02 sensor are not due to faulty sensors.

Jan 09, 2016 | 2006 Hyundai Santa Fe

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Trouble code: p0431 on 2004 hyundai santa fe 3.5L. Wondering about possible solutions


p0431 is described as "warm up catalyst efficiency below threshold (bank 2)" This code is in the exhaust system air injection section of the trouble codes. Possible it relates to an oxygen sensor reading.

Dec 29, 2012 | 2004 Hyundai Santa Fe

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Code P0037 on Santa Fe refers to bank 1 sensor 2 oxygen sensor. Where is it located?


Bank one is the first oxygen sensor in line from the engine back. Bank 2 is the second in line.

Apr 01, 2012 | 2001 Hyundai Santa Fe

1 Answer

Check engine lite on with PO421 code


P0421 = Catalyst System Efficiency below Threshold(Bank1) The catalyst's efficiency is demonstrated by its ability to oxidize CO and hydrocarbon emissions. The Powertrain Control Module (PCM) compares the output signals of the front and rear oxygen sensors to determine whether the output of the rear sensor is beginning to match the output of the front oxygen sensor. Air/fuel mixture compensation keeps the frequency of the front oxygen sensor high due to the changes from rich-to-lean combustion. The catalyst causes the rear oxygen sensor to have a lower frequency. As the catalyst wears, the rear oxygen sensor's signal trace begins to match the front oxygen sensor's signal trace. That is because the catalyst becomes saturated with oxygen and cannot use the oxygen to convert hydrocarbon and CO into H???O and CO??? with the same efficiency as when it was new. A completely worn catalyst shows a 100% match between the frequency of the front and rear sensors.

Aug 24, 2011 | 2004 Hyundai Santa Fe

1 Answer

Is there a difference in the oxygen sensors in my santa fe 2004?


Yes. there are two types on each car pre cat o2's and post cat o2's. The pre cat reads the exhaust stream to adjust fuel trim and the post cat o2's read to see if the emissions are within specs.

Nov 20, 2010 | 2004 Hyundai Santa Fe

1 Answer

Check engine problem


plug it into a scan tools .it could be a camshaft sensor or crank sensor ,,scan tool can deside this

May 11, 2010 | 2004 Hyundai Santa Fe

2 Answers

Where is the O2 sensor located on the 2003 V6 All Wheel Santa Fe and how dificult is it to replace?


Hyundai Santa Fe 2001-05
Heated Oxygen Sensor (H02S): The sensors are located in the exhaust system. On some vehicles, one sensor is located up at the exhaust manifold(s) and the other sensor is located down at the catalytic converter. On other vehicles, both sensors are located down at the catalytic converter.

d2217fa.jpg

How to Replace an Oxygen Sensor
Parts:
1. Oxygen Sensor
2. Oxygen Sensor

Tools:
1. 3/8 in. Drive Ratchet
2. Multimeter
3. Oxygen Sensor Socket
4. Combination Wrench Set
5. Crimp Tool
6. Socket Set
7. Scan Tool

Steps:
Step 1 * Park the vehicle on a level surface. Set the parking brake and open the hood.
o Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.
o Tip: Always make sure the struts on the hood can fully support the weight of the hood so that it does not close on you while working. The use of a hood prop can securely hold it in place.

Step 2 * With the engine off and cool, locate the defective oxygen sensor in the exhaust manifold or pipe. If necessary, lift the front of the vehicle and support it with jack stands.
o Tip: Most vehicles have multiple oxygen sensors. How many sensors, depends on the model year and type of engine.

Step 3 * Disconnect the wire connector at the defective oxygen sensor.

Step 4 * Remove the oxygen sensor from the exhaust system.

Step 5 * If you are installing a universal oxygen sensor, cut off the connector from the original sensor and splice the connector wires to the new oxygen sensor. Follow the manufacturer’s instructions supplied with the sensor.

Step 6 * For threaded oxygen sensors, apply anti-seize compound to the threads and install the new sensor.

Step 7 * For flange mounted oxygen sensors, install a new gasket and tighten the mounting bolts.

Step 8 * Reattach the wire connector from the sensor.

Step 9 * If necessary, connect the OBD I/II scanner and erase the fault code.

Hope help with this (remember rated and commented this help) Good luck.

Mar 01, 2010 | 2003 Hyundai Santa Fe

1 Answer

2001 Hyundai Santa Fe - Code P0421 Help!?


code p 0421 refers to warm up cat converter bank 1 --- efficiency below threshold ===causes ---cat converter---wiring ---HO2S (heated oxygen sensor )
there are not 4 oxygen sensor as you have been told but just 2 oxygen sensors located after each of the cat converters
The other 2 are heated oxygen sensor which are located in the exhaust manifold or exhaust pipe before the cat converters
heated oxygen sensors do a completely different job to the O2 sensors in that they report to the ECM, the combustion gas mixture so the the ECM can adjust the mixture for max performance
The oxygen sensors (O2) read what is left after the cat converters have done their job and report to the ECM so that it can fine tune the mix
IF you didn't replace the correct cat converter then that will make the code come back
If you just replaced the O2 sensor , well that doesn't even figure in the problem

Mar 14, 2017 | 2001 Hyundai Santa Fe

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