O2 (Oxygen) sensors? Numer and locations? - Kia Forum
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#1 (permalink) Old 06-28-2010, 04:51 PM
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Default O2 (Oxygen) sensors? Numer and locations?

Have a kia sedona 2002 and would like to know if the one O2 sensor on front on the exhaust manifold is the only O2 sensor in the emission system?

If there are more, can someone tell me were and possibly point me to purchasing the right ones for nthis vehicle?

Thank you!!

2002 Kia Sedona EX
3.5L SFI DOHC 6cyl

Last edited by oclemons69; 06-29-2010 at 03:13 PM. Reason: missing info
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#2 (permalink) Old 06-28-2010, 08:13 PM
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I looked on here. Kia Global Information System (KGIS)
Since you didn't specify what year or engine I looked under the 3.5l for years 2002 through 2005. It shows for the 6 cyl before the cat and after the cat on the exhaust manifolds there is a 02 sensor. There is not a before or after 02 sensor in the single exhaust pipe cat. That makes 4 all together. Fill in your profile with the proper info. Hope this helps.
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Quote:
Originally Posted by nstoolman1 View Post
I looked on here. Kia Global Information System (KGIS)
Since you didn't specify what year or engine I looked under the 3.5l for years 2002 through 2005. It shows for the 6 cyl before the cat and after the cat on the exhaust manifolds there is a 02 sensor. There is not a before or after 02 sensor in the single exhaust pipe cat. That makes 4 all together. Fill in your profile with the proper info. Hope this helps.
2002 Kia Sedona EX
3.5L SFI DOHC 6cyl
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Couldn't find a service manual for any earlier model on the kia tech forums earlier than a 2005. I did see on Autozones site that it gives a clue as to the 2002-2005 models having one sensor, while the 2006 and later have multiple. Does this make sense to anyone or am I to assume that the O2 sensor in the exhaust manifold is the only one on my van?

I'm posting the self-fix it section from Autozone below:

Location


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.


Testing

2002-2005

Perform a visual inspection of the sensor as follows:

If the sensor tip has a black/sooty deposit, this may indicate a rich fuel mixture.
If the sensor tip has a white, gritty deposit, this may indicate an internal coolant leak.
If the sensor tip has a brown deposit, this could indicate excessive oil consumption.
Warm the engine until the coolant temperature reaches operating temperature.
Disconnect the sensor electrical connector, and using a DVOM mete, measure the resistance between terminal 4 and 3.
Specification should be 30 ohms, or more.
Replace the sensor, if there is a malfunction.
Apply battery voltage directly between terminal 4 (power) and 3 (ground).
NOTE
Be careful when applying the voltage. Damage will result if terminals 1 and 2 are connected to any voltage.

Connect a voltmeter between terminal 2 (sensor output)and 1 (sensor ground).
While racing the engine repeatedly, measure the output voltage.
Specification should be 1 volt.
Replace the sensor, as required.

__________________________________________________ _________

2006Sensor One

Perform a visual inspection of the sensor as follows:

If the sensor tip has a black/sooty deposit, this may indicate a rich fuel mixture.
If the sensor tip has a white, gritty deposit, this may indicate an internal coolant leak.
If the sensor tip has a brown deposit, this could indicate excessive oil consumption.
Warm the engine until the engine reaches operating temperature.
Be sure the ignition is OFF. Disconnect the sensor connector.
Check the sensor for damage or contamination caused by foreign substance.
If the sensor is not normal, replace the component with a known good one and recheck. Replace the sensor as required.
If the sensor is normal, substitute a known good PCM and repeat the test. Replace the PCM as required.


Sensor Two

Perform a visual inspection of the sensor as follows:

If the sensor tip has a black/sooty deposit, this may indicate a rich fuel mixture.
If the sensor tip has a white, gritty deposit, this may indicate an internal coolant leak.
If the sensor tip has a brown deposit, this could indicate excessive oil consumption.
Warm the engine until the engine reaches operating temperature.
Be sure the ignition is OFF. Disconnect the sensor connector.
Using an ohmmeter, measure the resistance between terminals 1 and 2 (component side).
Specification should be 9.6 plus/minus 1.5 ohms at 69.8°F.
If not, replace the sensor.



Operation


The exhaust gas oxygen sensor supplies the electronic control assembly with a signal which indicates either a rich or lean mixture condition, during the engine operation.


Removal & Installation


Disconnect the electrical connector from the sensor.
Remove the oxygen sensor.


To install:

Installation is the reverse of the removal procedure.
NOTE
Apply anti-seize compound to the threaded portion of the sensor, prior to installation. Never apply anti-seize compound to the protector of the sensor.
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