P2251 HO2S Reference Ground Circuit/Open Bank 1, Sensor 1???

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08-28-2014, 07:24 PM

racing1219

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Location: Brooklyn, NY, 11229

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P2251 HO2S Reference Ground Circuit/Open Bank 1, Sensor 1???

Just got the code with my "Innova 3030" code reader...
It says like that: P2251 HO2S Reference Ground Circuit/Open Bank 1, Sensor 1
Does it mean that my upper CO2 sensor, or might be something else???

08-29-2014, 06:56 AM

NovaResource

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Posts: 5,301

Correct. The pre-cat sensor.

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