P0CBBHybrid/EV Battery Temperature Sensor P Circuit Intermittent/Erratic
- 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
- P0CBB is about short dropouts or spikes in the signal of sensor P that do not last long enough, or go far enough, to trip the low or high code. GM defines it in the HPC2 tables 16OBDG02 to 19OBDG02 and judges how restless the signal is: within each window of ten samples taken 100 ms apart the size of every change is added up, a total above 10 fails the window, and four bad windows in five produce the code, Type B, two trips. Enable conditions are more than 10.2 V and communication with the battery interface module. Neither the 2011/2012 Volt tables nor Mitsubishi know this fault type for sensor P. An intermittent contact often shows up only with vibration or temperature change, so the freeze frame and a road test with live data matter more than a static resistance check.
- What you may notice
- Intermittent warning that may clear by itself
- Erratic sensor P reading in live data
- Likely causes
- LikelyIntermittent contact at the sensor P plug
- PossibleHairline crack in the sensing board near the sensor P input
- RareUnstable reference or ground of the monitoring unit
- 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.