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P0051 Diagnostic Trouble Code Discussion for December 2008

Air Fuel Sensor (Bank 2 Sensor 1) Heater Control Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0051
Help Request Posted
2004 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on VIN: 1J4GW48S04
P0051: Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Low Voltage. ... Jeep Grand Cherokee with a 4.0L. I am getting a P0051 for an O2 heater problem on Bank 2 Sensor 1. I have replaced both upstream oxygen sensors with no help at all. I ran the heater test on a stone cold engine for the 5 mins just like all the flow charts s...
December 12, 2008