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P0155 Diagnostic Trouble Code Discussion for November 2004

Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Performance


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Trouble Ticket Help Requests for DTC P0155
Help Request Posted
1997 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMDU35P2V
P0155: HO2S21 heater ckt fault. Hello,have a vehicle that the mil has been on for a year. Tk started to run poorly and customer brought it in. I found numerous O2 codes and tk would enter closed loop with all O2's reading less than .1v. Checked all wires at O2 2/1. found good ground on sig r...
November 02, 2004
1997 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMDU35P2V
P0155: HO2S21 heater ckt fault. Hello,have a vehicle that the mil has been on for a year. Tk started to run poorly and customer brought it in. I found numerous O2 codes and tk would enter closed loop with all O2's reading less than .1v. Checked all wires at O2 2/1. found good ground on sig r...
November 02, 2004