P0146
O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3
P0146 is an OBD-II diagnostic trouble code meaning: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3. Common causes: faulty oxygen sensor, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Increased fuel consumption
- Check Engine Light Is On
- Reduced catalytic converter efficiency
Causes
- Faulty oxygen sensor
- Open or short circuit in wiring harness
- Poor contact in the sensor connector
- ECU malfunction
How to Fix
- Check the integrity of the sensor wiring harness
- Check the supply voltage and ground of the sensor
- Inspect connectors for corrosion or damage
- Replace the oxygen sensor if necessary
- Reset the error and check for its reappearance
Related codes
Error P0146 by Vehicle Brand
FAQ
What does the P0146 code mean?
P0146 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3
What causes a P0146 error code?
The most common causes of P0146 include: Faulty oxygen sensor; Open or short circuit in wiring harness; Poor contact in the sensor connector; ECU malfunction.
How do I fix a P0146 diagnostic trouble code?
To fix P0146: Check the integrity of the sensor wiring harness. Check the supply voltage and ground of the sensor. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0146?
Limited driving only, diagnose soon
How much does it cost to fix P0146?
The estimated repair cost for P0146 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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