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P0141 Diagnostic Trouble Code Discussion for February 2008

Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Performance

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Trouble Ticket Help Requests for DTC P0141
Help Request Posted
1997 GMC C1500 Sierra SL 5.7L MIL Lamp on VIN: 2GTEC19R8V
P0141: Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction. Truck came in with a P0141 Code (02 B1S2 O2 Heater) and replaced O2 sensor (behind cat)--returned 2 days later same code -- checked heater of O2 by resistance measurment (was OK) -- This time checked voltage at all O2 sensors and found B1S2 connector losing p...
February 08, 2008
1996 Ford E-150 Econoline 4.9L MIL Lamp on VIN: 1FTEE14YXT
P0141: post cat o2 heater. truck did have a code po135 in memory,a new rear o2 cured that,now have po141 for heater problem,first question is how does the ecm know what that heater is doing,the wiring harness shows no tie with the ecm,also how do i fix it?thanks in advance,mark
February 11, 2008