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P0155 Diagnostic Trouble Code Discussion for February 2013

Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Performance

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Trouble Ticket Help Requests for DTC P0155
Help Request Posted
2002 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on VIN: 1J4GW48S82
P0155: Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction. This has been eating our lunch. Jeep went elsewhere for MIL on, they put in NTK sensors. Codes returned. Per MOD DTC charts, heater resistance should 5 ohms or less at room temp. NTK measured 5.9 and 6.2. The Boss likes Bosch, got a set, they measure 5.2. Clos...
February 14, 2013