P0C33: Hybrid/EV Battery Temperature Sensor F Circuit
What to do
As P0BC2 — a temperature sensor fault costs performance and charging rate on a perfectly healthy pack, because the reading governs what the car permits.
What this code means
The sixth of the traction battery's temperature sensors has a circuit fault.
Sensors A to E are already written, ending at P0BC2, and the family's argument lives there: a battery does not have a temperature, so it is measured in several places, and a bad reading does not merely misinform — it changes what the car will let the battery do, because temperature sets charging rate, available power and whether rapid charging is permitted at all.
What a sixth sensor adds is worth one line: the correlation checks at P0C6E–P0C72 compare each sensor against its neighbour, and that chain is only as long as the number of sensors. Sensor F is the last link in it, so losing it also loses the E/F comparison — which is why a single sensor fault here often arrives with a correlation code beside it rather than alone.
Likely causes
Start here
- Faulty battery temperature sensor · specialist
- Corroded or loose connector · easy
Less common
- Damaged cell voltage sense harness · specialist
- Faulty battery pack sensor module · 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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