P0146

O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

P0135 P0136 P0141