P0CB6Hybrid/EV Battery Temperature Sensor O 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
- P0CB6 targets a sensor O signal that jitters or jumps instead of changing smoothly. Only GM's later HPC2 tables (16OBDG02 to 19OBDG02) define it: every 100 ms a sample is taken, the absolute steps between ten consecutive samples are summed, and a sum above 10 marks that window as failed. Four failed windows out of five set the code as Type B, so the lamp follows on the second trip; the test needs more than 10.2 V and a working link to the battery interface module. The earlier Volt tables of 2011 and 2012 had no such code for O, and Mitsubishi uses none for its pack sensors. Because the reading can stay inside the valid band, P0CB4 and P0CB5 may never appear. Shaking the harness while watching live data, and the freeze-frame record, help to find a fretting contact or cracked solder joint.
- What you may notice
- Warning lamp that comes and goes
- Sensor O value jumping in live data
- Likely causes
- LikelyFretting or loose terminal in the sensor O circuit
- PossibleCracked solder joint or trace on the sensing board
- RareChafed lead touching ground only under vibration
- 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.