P01F7

O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 4

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Check Engine light comes on
Reduced engine power

Causes

Oxygen sensor malfunction
Damage to the sensor wiring harness
Fuel leak
Problems with the fuel system
Sensor contamination

How to Fix

Check the condition of the oxygen sensor
Check the integrity of the wiring harness
Check the fuel system for leaks
Replace the oxygen sensor if necessary
Clean or replace fuel injectors

Related codes

P0172 P0175 P0135 P0141