O2 sensor
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O2 sensor
My check engine light came on so I ran the scanner through and got P0141 which is a 02 sensor heater circuit malfunction(bank 1, sensor 2) Which sensor would be bad? I noticed one sensor in each exhaust manifold and then one in the cat.
Posting Guru
Joined: Oct 2005
Posts: 2,209
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From: Louisville, Kentucky
Passenger side cat sensor. Have you searched the forum for that particular code? Good luck!
https://www.ford-trucks.com/forums/5...ml#post4353707
https://www.ford-trucks.com/forums/5...ml#post4353707
Posting Guru
Joined: Oct 2008
Posts: 1,145
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From: Hernando Ms
FYI...The 2 upstream sensors(Exhaust manifold) tell the computer what to do,the downstream ones merely check the converter operation,and "advise" if one of the cats are beyond operational thresholds.....
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