P0CBAHybrid/EV Battery Temperature Sensor P 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
- P0CBA appears when the signal of sensor P rises above its upper voltage limit, the typical picture of an open circuit: without a closed path through the thermistor, the pull-up resistor drives the input high and the computed temperature drops to an absurd value. GM's 2019 HPC2 table 19OBDG02 fails it when 8 of 10 readings at 100 ms fall below −69 °C, Type B, provided supply exceeds 10.2 V and the battery interface control module is online. In the 2011 Volt table the limit was −40 °C, a raw count above 4,000, held 1.4 s within 2 s, and a single trip set the code. On the Outlander PHEV, Mitsubishi files P0CBA as an open circuit of module sensor [15] once the voltage stays above 3.97 V for 2 s. Cold-weather strategies such as pack heating may then start needlessly; P0CB9 is the matching low code.
- What you may notice
- Very low battery temperature displayed on a warm day
- Battery heater or engine running more than usual
- Likely causes
- LikelyOpen circuit or disconnected plug of sensor P
- PossibleThermistor P broken internally
- RareSpread or corroded terminal on the sensing board
- 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 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.