P0166 OBD II Trouble Code 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)
Detailed information on troubleshooting and repairing a P0166 DTC code which refers to the O2 sensor circuit with no detected activity.
Symptoms of P0166 OBD II Trouble Code
- MIL (Malfunction Indicator Lamp) on
- May idle or drive poorly
- Fuel economy may decrease
Common Causes of P0166 OBD II Trouble Code
- Bad Bank 2, position 3, o2 sensor
- Wiring problem, melted harness, broken connectors, etc.
- Bad PCM