P0151

O2 Sensor Circuit Low Voltage Bank 2 Sensor 1

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Unstable idle
Loss of engine power
Check Engine Light Is On

Causes

Faulty oxygen sensor
Open or short circuit in wiring harness
Corrosion or poor contact in the sensor connector
Sensor circuit grounding problem
ECU malfunction

How to Fix

Check the integrity of the sensor wiring harness
Check the sensor connector for corrosion
Replace the oxygen sensor if necessary
Check the voltage in the sensor circuit with a multimeter
Reset the error and check for its reappearance

Related codes

P0131 P0152 P0153 P0154