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1997 Ford F-150 Question: Won't pass Az emissions

 

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cheezits, 4.6L V8, Phoenix, AZ, May 28, 2009, 11:19
 Rookie

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?

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  • Answer #1

    Bret Bodas from RepairPal Test Shop, May 28, 2009, 11:54
     Master

    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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