Low voltage oxygen sensor (upstream). My check engine light keeps coming on and telling me I have the code P0131. This means that the upstream oxygen sensor has low voltage. I've replaced both the upstream and downstream oxygen sensors, but still get the check engine light coming on and giving the same code. What could cause this and how do I fix it?

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06 Dec, 2017

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    Solved this issue
  • 102min
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  • 63%
    Recommend to DIY
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This code does not mean to replace the sensor , testing is what is suppose to happen .
P0131 O2 Sensor Circuit Low Voltage Bank 1 Sensor 1

Honda Civic P0131 02 Sensor Diagnosis
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