P0CBB code meaning
Hybrid/EV Battery Temperature Sensor P Circuit Intermittent/Erratic
Powertrain system Generic code P0Cxx codes Check engine light
What P0CBB means
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.
P0CBB at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0CBB
- Intermittent warning that may clear by itself
- Erratic sensor P reading in live data
Common causes of P0CBB
- Most likelyIntermittent contact at the sensor P plug
- PossibleHairline crack in the sensing board near the sensor P input
- Less likelyUnstable reference or ground of the monitoring unit
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery temp sensor pWiring harnessBms
What each part of P0CBB means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| BB | The exact fault in that area. |
What to do next
- Note P0CBB and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0CBB
What does P0CBB mean?
P0CBB means "Hybrid/EV Battery Temperature Sensor P Circuit Intermittent/Erratic". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CBB?
Drive gently and only to a workshop. With P0CBB the car can go into limp mode (reduced power) to protect itself.
Will P0CBB fail an emissions test?
Yes, it can. P0CBB is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0CBB to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0CBB clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.