P014C

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

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–167 (est.)

Symptoms

Increased fuel consumption
Deterioration in dynamics
Unstable idle
Check Engine Light Is On

Causes

Oxygen sensor malfunction
Sensor contamination (oil, antifreeze)
Damage to the sensor wiring harness
Vacuum leaks
Problems with the fuel system (dirty injectors, faulty fuel pump)
Malfunction of mass air flow sensor or absolute pressure sensor
Problems with the ignition system

How to Fix

Check the correctness of the oxygen sensor readings using a diagnostic scanner
Inspect the wiring harness and sensor connector for damage.
Check the system for air or air leaks
If necessary, replace the oxygen sensor
Clean or replace the mass air flow sensor if there are problems
Check the condition of the fuel system and ignition system

Related codes

P0130 P0131 P0132 P0133 P014D