P0CB7 code meaning
Hybrid/EV Battery Temperature Sensor P Circuit
Powertrain system Generic code P0Cxx codes Check engine light
What P0CB7 means
P0CB7 covers an electrical fault of battery temperature sensor P that the controller cannot pin down as low, high or intermittent. No manufacturer lists this code on a public official server. In GM's 2011 Volt rationality table P is the sixteenth and last sensor, and GM gives it only P0CB8 to P0CBB; Mitsubishi's Outlander PHEV treats P as module sensor [15] with rationality, short and open codes. In this block P is the final sensor letter, the next code P0CBC already concerns drive motor cooling. CARB requires the battery temperature sensors to be monitored under section (e)(15.2.3)(A)(iv), with circuit faults and range violations to be told apart per (e)(15.2.1). A missing value of P makes the battery controller act cautiously and lower power. Checking means opening the de-energised pack.
P0CB7 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 P0CB7
- Hybrid or EV warning message
- Limited electric power until repaired
Common causes of P0CB7
- Most likelyLoose or corroded plug of sensor P
- PossibleDamaged wiring of sensor P inside the pack
- Less likelyMeasuring channel for sensor P in the monitoring unit faulty
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 P0CB7 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. |
| B7 | The exact fault in that area. |
What to do next
- Note P0CB7 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 P0CB7
What does P0CB7 mean?
P0CB7 means "Hybrid/EV Battery Temperature Sensor P Circuit". P0CB7 covers an electrical fault of battery temperature sensor P that the controller cannot pin down as low, high or intermittent. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CB7?
Drive gently and only to a workshop. With P0CB7 the car can go into limp mode (reduced power) to protect itself.
Will P0CB7 fail an emissions test?
Yes, it can. P0CB7 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 P0CB7 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0CB7 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.