Code result
P25AF
Coolant Temperature Control Module Requested MIL Illumination
Moderate severity
What it means
A dedicated coolant-temperature control module (used on engines with electric coolant pumps and electronic thermostats to keep the cylinder head and block at independent setpoints) has requested the ECM to illuminate the MIL because of an emissions-relevant fault on its side. Original fault is in that module.
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
Internal fault — read the module DTCs
highOne of the most commonly reported causes for this code — check this first.
Related help
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