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P0155 Diagnostic Trouble Code Discussion for May 2008

Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Performance

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Trouble Ticket Help Requests for DTC P0155
Help Request Posted
1998 Mercury Sable GS 3.0L Stall, Poor Fuel Economy, MIL Lamp on VIN: S8WA633498
P0155: HO2S O2 Heater Circuit 21. ... with this one. This Mercury keeps coming back with the same code's P0135 and P0155. All four O2 Sensors have been replace. Wiring from computer to related O2 connectors have been check for continuity, short to Grd, short to voltage and checks OK at the ti...
May 11, 2008
1996 Ford F-150 Special 5.0L MIL Lamp on VIN: 1FTEX14M2T
P0155: heater ckt fault koeo test. run codes on snap on scanner, found codes PO135 HO2S11 heater circuit fault, code po155 HO2S21 heater circuit fault, PO141 HO2S21 heater circuit fault, checked wire diagrams, found heated o2 sensor fuse under hood blown, replaced fuse cleared codes and road te...
May 16, 2008