P0C7FHybrid/EV Battery Temperature Sensor G Circuit High
- 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
- 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.
- What you may notice
- 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
- Likely causes
- LikelyOpen circuit or unplugged connector at sensor G
- PossibleThermistor G open internally
- RareModule software setting it falsely in mild cold (GM Volt, 18-NA-342)
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.