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P2278

O2 Sensor Signals Swapped Bank 1 Sensor 3/Bank 2 Sensor 3

What this code means

Diagnostic trouble code P2278 indicates: O2 Sensor Signals Swapped Bank 1 Sensor 3/Bank 2 Sensor 3. It was set by your vehicle's onboard diagnostics system and will typically keep the check engine light on until it's addressed.

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