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Won't pass Az emissions

(1997 Ford F-150)
in Phoenix, AZ on May 28, 2009
code 0141...replaced o2 sensors front and rear (left bank), cleared code, drove 60 miles to run cycle, code remains.

obd-II review I/M monitors
-Htd calalyst...inc.
-Evap system Mon...inc.

any suggestions?

Displaying 1 answers & 0 comments
Popular Answer
on May 28, 2009
P0141 is likely from the pre-heater circuit not working. This is mostly from a bad O2 sensor. Check to make sure it is getting power to that circuit when the engine is started up cold, and make sure the wiring is OK. I suggest only using OEM O2 sensors as well. Let us know what you find out! Good Luck
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