P01F4

O2 Sensor Circuit Slow Response 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 at idle
Reduced engine power
Check Engine Light Is On

Causes

Bank 1 Sensor 4 Oxygen Sensor Malfunction
Damage to the wiring harness to the sensor
Poor contact in the sensor circuit
Sensor contamination
Problems with the catalytic converter

How to Fix

Check the status of the oxygen sensor Bank 1 Sensor 4
Inspect the wiring harness and connectors for damage.
Clean or replace the oxygen sensor
Check the operation of the catalytic converter
Reset the error and check if it returns

Related codes

P0141 P0135 P0140