P01F6

O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 4

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light
excessive fuel consumption
power reduction
unstable engine operation

Causes

oxygen sensor malfunction
air leak in intake
problems with the fuel system (low pressure)
catalytic converter malfunction
damage to the sensor wiring harness

How to Fix

check the integrity of the sensor wiring harness
eliminate air leaks in the intake tract
check fuel pressure
replace the oxygen sensor (if necessary)
check the condition of the catalytic converter

Related codes

P0171 P017 genesis P0135 P0140