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Engine Control System - DTC Diagnostics (P1659 - U0047)
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DTC Troubleshooting
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DTC P2270
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Overview
DTC P2270: Overview
If the secondary HO2S (sensor 2) output voltage is lower than a specified value when the power is applied to the secondary HO2S (sensor 2) heater, the PCM determines an abnormality and stores the DTC.