P014D

O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Unstable idling
Reduced engine power
Increased content of harmful emissions

Causes

Dirty or worn oxygen sensor
Damaged or corroded sensor wiring harness
Vacuum leaks
Exhaust system leaking
Problems in the fuel supply system
Engine control unit malfunction

How to Fix

Check the visual condition of the sensor and its connector
Check the integrity of the wiring harness
Check the system for vacuum leaks
Check the exhaust system for leaks
Check sensor operating parameters with a scanner
If necessary, replace the oxygen sensor

Related codes

P0135 P0141 P0171 P0172