P0C7E code meaning
Hybrid/EV Battery Temperature Sensor G Circuit Low
Powertrain system Generic code P0Cxx codes Check engine light
What P0C7E means
P0C7E means the sensor G voltage has fallen below its valid range. The thermistor has a negative temperature coefficient and a pull-up on the sensing board, so a short to ground looks like an extremely hot cell group; low describes the signal, not the temperature. GM's 2019 table for hybrid powertrain control module 2 (19OBDG02) fails it when the converted reading exceeds 160 °C in 8 of 10 samples taken every 100 ms, Type B, two trips; bulletin 18-NA-342 files it under sensor 7 as a low-voltage fault on the Volt. Mitsubishi's Outlander PHEV of 2022 sets it as a sensor [06] short when the voltage stays under 0.12 V, above 125 °C, for 2 s. The open-circuit opposite is P0C7F; a pack that really runs hot reports P0A7E. Expect power limits and hard-working battery cooling.
P0C7E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C7E
- Warning lamp with sharply reduced electric power
- Battery cooling fan or chiller running constantly
- Engine runs more often on plug-in hybrids
Common causes of P0C7E
- Most likelySensor G signal line chafed through and shorted to ground
- PossibleThermistor G shorted internally, often after moisture entry
- Less likelyInput stage of the cell monitoring board pulled low
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery temp sensor gWiring harnessBms
What each part of P0C7E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 7E | The exact fault in that area. |
What to do next
- Note P0C7E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0C7E
What does P0C7E mean?
P0C7E means "Hybrid/EV Battery Temperature Sensor G Circuit Low". P0C7E means the sensor G voltage has fallen below its valid range. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C7E?
Drive gently and only to a workshop. With P0C7E the car can go into limp mode (reduced power) to protect itself.
Will P0C7E fail an emissions test?
Yes, it can. P0C7E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0C7E to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0C7E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.