03 Explorer Oxygen sensor swapping | Ford Explorer Forums

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03 Explorer Oxygen sensor swapping

indygrump

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May 20, 2011
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Year, Model & Trim Level
2003 exploder
Hi all,

My wife's 2003 Explorer had the "Service Engine Soon" light come on. I did a code check and it's throwing a P2270 Bank1 Sensor2 stuck lean error. There are 4 sensors, so I wanted to make sure the sensor is bad before I buy a new one. I swapped the rear 2 sensors thinking the code would change to the other bank if the sensor was bad. I swapped the two back sensors, reset the code and took it for a drive. The check engine light came back on but I get the same P2270 error code.

Are the sensors different? Two different temp ranges or something? Or is there something else going on up stream? I checked the connectors and wires and they all look fine.

Thanks
Robert
2003 Explorer XL V6 Automatic tranny (tranny number 2 :thumbdwn:)
 






They are the same side to side after the cats. no difference. You could have a wiring issue, rubbed through or burned through wires shorting to the exhaust or transmission/engine.
 






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