P015C

O2 Sensor Delayed Response - Rich to Lean 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 engine operation
Deterioration in dynamics
Check Engine Light Illuminates

Causes

Oxygen sensor dirty
Sensor circuit malfunction (open circuit, corrosion)
Problems with the fuel system (leaks, faulty injectors)
Engine ECU malfunction

How to Fix

Check the condition of the oxygen sensor (Bank 2 Sensor 1)
Check the integrity of the wiring harness and connectors
Check the fuel system for leaks and serviceability of injectors
If necessary, replace the oxygen sensor

Related codes

P0135 P015B P0172 P0175