Code result
P026F
Coolant Thermostat Performance
Moderate severity
What it means
Thermostat does not regulate coolant temperature in the expected range. Often stuck open (slow warmup) or stuck closed (overheat).
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
highOne of the most commonly reported causes for this code — check this first.
Related help
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