P0CC0: Drive Motor A Coolant Temperature Sensor Circuit Intermittent
What to do
As P0CBC — expect the car to reduce power under sustained load rather than fail outright. Check which of the three cooling circuits this vehicle's motor uses and whether it takes coolant or oil; they have separate reservoirs and the wrong one gets topped up surprisingly often.
What this code means
Drive motor A's coolant temperature sensor is reading erratically, which is a connection rather than a measurement. Why the motor has a cooling circuit of its own, and how it differs from the electronics and battery loops, are at P0CBC.
Likely causes
Start here
- Faulty inverter coolant temperature sensor · moderate
- Corroded or loose connector · easy
Less common
- Low inverter coolant level · easy
- Chafed harness between transaxle and inverter · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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