Code result
P016A
Excessive Time To Enter Closed Loop Air/Fuel Ratio Control
Moderate severity
What it means
ECU took longer than allowed to enter closed-loop air/fuel ratio control. Most often O2 sensor heater aging or coolant temperature reading wrong.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
O2 sensor heater aged
highOne of the most commonly reported causes for this code — check this first.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P016A freeNo credit card required