1997 Ford F-150 Q&A

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

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? -
Answer 1
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 -