P0146 - O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 3)

Bank 1 sensor 3 oxygen sensor shows no activity.

Code Overview

Bank 1 sensor 3 oxygen sensor shows no activity.

Common Causes

• Failed O2 sensor
• Open circuit
• Connector damage
• Exhaust system issue

Diagnostic Steps

1. Verify the sensor is connected and powered
2. Inspect wiring near the exhaust
3. Check live data for any sensor switching

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.