The control module detected a fault associated with the Coolant Temperature Control Module Requested MIL Illumination circuit or function; the stored code identifies the affected component rather than a single failure mode.
TuningBot DTC Database · v4.37.15
P25AF Coolant Temperature Control Module Requested MIL Illumination
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P25AF means
Related and nearby codes
How to read P25AF
Powertrain: engine, transmission and driveline systems.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about P25AF
What does P25AF mean?
Coolant Temperature Control Module Requested MIL Illumination. The control module detected a fault associated with the Coolant Temperature Control Module Requested MIL Illumination circuit or function; the stored code identifies the affected component rather than a single failure mode.
Is P25AF generic or manufacturer-specific?
P25AF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P25AF at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
