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WHAT CODE PO140 MEANS

(1997 Dodge Ram 2500)
in Indio, CA on December 02, 2012
ON DODGE RAM VAM 1997 2500
Displaying 1 answers & 0 comments
Popular Answer
on December 02, 2012
It means the ecm has detected a problem with the rear o2 sensor or circuit. USUALLY replacment will fix this but not always.
Circuit can be checked with a DVOM. Or just take a shot at it with a new sensor.
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