2003 Jeep Liberty Check Engin Light ON

2003 JEEP LIBERTY
83,005 MILES • 6 CYL • 4WD • AUTOMATIC
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TWEETYNY
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  • 3 POSTS
AutoZone tech diagnose with his computer and he find out error code P0133.
After that check engine light get OFF. But next day when I was on highway then check engine lgiht turn ON again. Here is the error code definition and explanation.
Definition:
6BH02s11 slow response (heated oxygen sensor bank 1 BBsensor1)
Explanation:
BBThe powertrain control module uses the oxygen
BBsensor to calculation the Air/Fuel ration in the BBexhaust.

When I checked in service manual they said v6 engine has 4 oxygen sensors.

Upstream
1. Right Upstream sensor (2/1)
2. Left Upstream sensor (1/1)

Downstream:
3. Left Downstream sensor (1/2)
4. Right Dwonstream sensor (2/2)

but i am not sure where exectly bank 1 location.

Could someone please help me.
[img:8d0345fadd]http://www.2carpros.com/forum/automotive_pictures/286879_2003_Jeep_Liberty_Service_Manual_o2_p1_1.jpg[/img:8d0345fadd]
May 1, 2009 at 8:43 AM
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ATKAPARKING
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  • 64 POSTS
I don't remember the cylinder location on this engine, but bank one is the head with #1 cylinder at the front.

If this were my vehicle, I would replace both upstream o2 sensors. The computer is set up to display this code when the sensor signal is at 15% variance from standard reading. (If vehicles operated at 100% they'd constantly set check engine lights). o2 sensors fatigue and are a overlooked part of a tuneup. If one needs replaced, the other is probably not far behind. It may already be operating at 10% less than the efficiency of new, and the computer will not alert you to this until it hits that 15% threshold.
May 4, 2009 at 7:28 PM
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