P0CF2: Hybrid/EV Electronics Coolant Temperature Sensor A Circuit Intermittent/Erratic
What to do
As P0CEE. If the car has become slower to charge or less willing under load with nothing else changed, this is a good candidate — the reading sets both limits, so one faulty sensor costs performance and charging speed at once.
What this code means
The electronics coolant temperature sensor is reading erratically, which is a connection rather than a measurement. Why this reading governs both acceleration and charging speed is at P0CEE.
Likely causes
Start here
- Faulty inverter coolant temperature sensor · moderate
- Corroded or loose connector · easy
Less common
- Low inverter coolant level · easy
- Coolant leak into the sensor connector · moderate
Symptoms
Components involved
Information, not instruction
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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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Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
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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