P0CB8Hybrid/EV Battery Temperature Sensor P 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
- P0CB8 flags sensor P as implausible: its value is electrically fine, but after a long rest it disagrees with the temperature of the other modules. GM runs this comparison in the 2012 Volt table 12OBDG01A only when drive system, external charging and battery conditioning have rested for over 21,600 s, so the whole pack should have settled; 50 of 67 samples more than 25.3 °C from the average give a Type B fault. In the HPC2 table 18OBDG02 the limit is 25.00 °C, sampled every 25 ms for about 1.7 s, and the check is held back by circuit or erratic faults and by lost communication. Mitsubishi uses P0CB8 for module sensor [15] of the Outlander PHEV with a 13 °C limit over 0.32 s after more than 3,600 s soak. Comparing all sensors in live data after an overnight stand shows the outlier.
- What you may notice
- Warning appearing at the first drive after a long stand
- Battery output restricted
- Likely causes
- LikelyThermistor P drifted out of calibration
- PossibleSensor P detached from its module surface
- RareReal temperature difference of that module, e.g. faulty cell
- 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.