Code result
P011A
Engine Coolant Temperature Sensor 1/2 Correlation
Moderate severity
What it means
ECT sensors 1 and 2 readings disagree beyond plausible limits — typically near startup both should match within tolerance.
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
One sensor drifted
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 P011A freeNo credit card required