Kia Troubleshooting Questions? Ask a Mechanic
DTC Code P0131
Description: Oxygen Sensor Circuit Low Voltage (Bank 1, Sensor 1)
Description: Oxygen Sensor Heater Circuit (Bank 1, Sensor 1)
You need a scan tool that can read live data. You can look at short and long term fuel trims and oxygen sensor voltage readings.
You can check for vacuum leaks, that would cause a lean condition.
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