P0C7DHybrid/EV Battery Temperature Sensor G Circuit Range/Performance
- 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
- P0C7D flags sensor G when its value is electrically valid but does not fit the rest of the pack. GM's 2012 Volt table (12OBDG01A) compares it with the average of the other sensors once propulsion has been off for more than 21,600 s and fails it beyond 25.3 °C in 50 of 67 samples, Type B with two trips; bulletin 18-NA-342 calls it sensor 7 performance. Mitsubishi's Outlander PHEV of 2018 files it as rationality of sensor [06]: after at least 3,600 s soak, with the pack between −30 and 60 °C, a 13 °C gap from the 50-sensor average held for 0.32 s sets it, checked once per drive. Shorts and opens have their own codes P0C7E and P0C7F. Usual causes are a drifting or detached thermistor; GM also fixed false sets on the Volt with new module software.
- What you may notice
- Check-engine or hybrid warning lamp after a long parking period
- Reduced battery power, sometimes a battery-too-cold message
- Likely causes
- LikelyThermistor G drifted while staying inside its electrical range
- PossibleSensor G no longer seated against its cell group
- PossibleBattery module software setting the code falsely (GM Volt, 18-NA-342)
- RareReal temperature difference from a weak cell or blocked cooling channel
- 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: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.