Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
P0C45
WysokiCode P0C45 means too high signal in the coolant temperature sensor circuit of the hybrid/electric battery (sensor 'A').
Code P0C45 informs about a too high signal from the coolant temperature sensor of the hybrid or electric battery. This could mean a fault in the sensor itself, wiring problems, or less commonly, a control module malfunction. Neglecting this error risks battery overheating and serious damage – therefore it is worth consulting a professional workshop specializing in hybrid vehicles.
Symptoms
Illumination of the MIL (Check Engine) light, possible power limitation of the hybrid system, warning messages regarding battery temperature, potential transition to fail-safe mode (limp mode), higher fuel consumption.
Possible causes
- Faulty battery coolant temperature sensor - Short to voltage or ground in the sensor signal wires - Damaged wiring harness or connector (corrosion, chafing) - Malfunction of the hybrid control module (HPCM/BCM) - Low coolant level or air in the battery cooling system
Affected systems
Układ chłodzenia akumulatora hybrydowego/EVModuł sterujący hybrydą (HPCM)System zarządzania akumulatorem (BMS)Układ napędowy (Powertrain)
Sources and further reading
Does code P0C45 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.