P01F3

O2 Sensor Circuit High Voltage Bank 1 Sensor 4

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Reduced catalytic converter efficiency
Increased fuel consumption

Causes

Oxygen sensor malfunction
Open or short circuit in wiring harness
Contact corrosion
ECU malfunction (rare)

How to Fix

Check the wiring harness for damage
Check sensor contacts for corrosion
Measure the sensor resistance
Replace the oxygen sensor if necessary
Clear error memory and carry out a test drive to confirm that the problem has been resolved

Related codes

P0135 P0136 P0137 P0138