The control module detected a fault associated with the Hybrid/EV Electronics Coolant Pump A Underspeed circuit or function; the stored code identifies the affected component rather than a single failure mode.
TuningBot DTC Database · v4.37.15
P2C66 Hybrid/EV Electronics Coolant Pump A Underspeed
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P2C66 means
Related and nearby codes
How to read P2C66
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 P2C66
What does P2C66 mean?
Hybrid/EV Electronics Coolant Pump A Underspeed. The control module detected a fault associated with the Hybrid/EV Electronics Coolant Pump A Underspeed circuit or function; the stored code identifies the affected component rather than a single failure mode.
Is P2C66 generic or manufacturer-specific?
P2C66 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2C66 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
