P0166 Error on Toyota

Q: P0166 Error on Toyota

If the Check Engine light of your Toyota is on and the scanner shows the P0166 code, it means the ECU has detected the following problem: O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)

What it means and how to fix it

🚨 Fault Description (P0166)

If the Check Engine light of your Toyota is on and the scanner shows the P0166 code, it means the ECU has detected the following problem:

"O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)"

Although this is a standardized OBD2 code, the symptoms and the location of the faulty sensor can vary depending on the exact model of your Toyota (year, engine type, etc).

Other frequent faults detected in Toyota:

P0420 P0300 P0171 P0401 P0141 P0430 P0113 P0455 P0301 P0302 P0303 P0304 P0135 P0442 P0172

Get an Exact AI Diagnosis for your Toyota

With the CarWatch app you can connect a Bluetooth OBD2 scanner and let our AI analyze the P0166 code by crossing it with your vehicle's history and real-time telemetry.

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Recommended OBD2 Scanner for Toyota

To clear the engine light and read the P0166 code from your phone, you need an OBD2 adapter compatible with the Toyota ECU.

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