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P2251 Diagnostic Trouble Code Discussion for March 2011

Air Fuel Ratio Sensor (Bank 1 Sensor 1) Reference Ground Circuit Open

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Trouble Ticket Help Requests for DTC P2251
Help Request Posted
2005 Hyundai Elantra GLS 2.0L MIL Lamp on VIN: KMHDN46DX5
P2251: Heated Oxygen Sensor (Bank 1 Sensor 1) Reference Ground Circuit Open. ... on, shows P2251, open ground referance circuit to #1 O2. This vehicle has already had both O2's and the front catalytic convertor.
March 22, 2011