P0C7EHybrid/EV Battery Temperature Sensor G Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Warning lamp with sharply reduced electric power
- Battery cooling fan or chiller running constantly
- Engine runs more often on plug-in hybrids
- Likely causes
- LikelySensor G signal line chafed through and shorted to ground
- PossibleThermistor G shorted internally, often after moisture entry
- RareInput stage of the cell monitoring board pulled low
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.