The control module determined that the Piston Cooling Oil Control Circuit Performance/ did not change state as commanded and appears stuck.
TuningBot DTC Database · v4.37.15
P25AC Piston Cooling Oil Control Circuit Performance/Stuck Off
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P25AC means
Related and nearby codes
How to read P25AC
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 P25AC
What does P25AC mean?
Piston Cooling Oil Control Circuit Performance/Stuck Off. The control module determined that the Piston Cooling Oil Control Circuit Performance/ did not change state as commanded and appears stuck.
Is P25AC generic or manufacturer-specific?
P25AC is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P25AC 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
