P0C8EHybrid/EV Battery Temperature Sensor J 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
- P0C8E sets when sensor J delivers an electrically valid temperature that disagrees with the other modules. For the 2012 Volt, table 12OBDG01A runs the check only after propulsion, off-board charging and battery conditioning have all been inactive for more than 21,600 s, so the pack should be evenly soaked; a gap above 25.3 °C to the mean of the remaining sensors in 50 of 67 samples fails it, Type B. The 2019 GM table 19OBDG02 keeps the logic with a 25.00 °C limit. Mitsubishi, on the 2018 Outlander PHEV, calls it rationality of sensor [09] and accepts a much smaller gap of 13 °C once the car has stood for 3,600 s. A loosened sensor or a real hot spot is more likely than a wiring fault; P0C8F and P0C90 cover shorts and opens.
- What you may notice
- Warning lamp appearing after the car has been parked for many hours
- Battery power reduced while the pack is cold or warm
- Likely causes
- LikelyThermistor J drifted but still within its electrical range
- PossibleSensor J no longer pressed against its cell group
- RareActual temperature difference from a weak cell or blocked cooling path
- 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.