Code result
P01F0
Coolant Temperature Relapsed Below Diagnostic Monitoring Temperature
Moderate severity
What it means
Coolant temperature dropped below the diagnostic monitoring threshold after warm-up. Often thermostat stuck open or stuck-open coolant heater bypass.
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
Thermostat stuck open
highOne of the most commonly reported causes for this code — check this first.
Related help
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