P0C7F code meaning
Hybrid/EV Battery Temperature Sensor G Circuit High
Powertrain system Generic code P0Cxx codes Check engine light
What P0C7F means
With P0C7F the sensor G input reads above its valid voltage range. Because the pull-up raises the line when the thermistor is disconnected, an open circuit, broken wire or unplugged connector shows up as an implausibly cold cell group. GM's 2016 Cadillac ELR table (16OBDG01) sets it below −40 °C for 1.4 s within a 2 s window, two trips, and the 2019 table 19OBDG02 below −69 °C in 8 of 10 samples, Type B. Mitsubishi's Outlander PHEV of 2018 calls it a sensor [06] open once the voltage exceeds 3.97 V, colder than −62 °C, for 2 s. On the Volt, GM bulletin 18-NA-342 links these sensor 7 high-voltage sets to a Battery Too Cold message above −25 °C and cures false ones with new software. Its short-circuit partner is P0C7E.
P0C7F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C7F
- Battery-too-cold or plug-in-to-warm message although it is not very cold
- Reduced electric power or no electric drive
- Battery heater switched on without need
Common causes of P0C7F
- Most likelyOpen circuit or unplugged connector at sensor G
- PossibleThermistor G open internally
- Less likelyModule software setting it falsely in mild cold (GM Volt, 18-NA-342)
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 P0C7F 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. |
| 7F | The exact fault in that area. |
What to do next
- Note P0C7F 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 P0C7F
What does P0C7F mean?
P0C7F means "Hybrid/EV Battery Temperature Sensor G Circuit High". With P0C7F the sensor G input reads above its valid voltage range. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C7F?
Drive gently and only to a workshop. With P0C7F the car can go into limp mode (reduced power) to protect itself.
Will P0C7F fail an emissions test?
Yes, it can. P0C7F 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 P0C7F to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P0C7F 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.