Won't pass Az emissions on 1997 Ford F-150

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?

by in Phoenix, AZ on May 28, 2009
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , 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