P0CB1 code meaning
Hybrid/EV Battery Temperature Sensor N Circuit Intermittent/Erratic
Powertrain system Generic code P0Cxx codes Check engine light
What P0CB1 means
P0CB1 points to an unsteady sensor N signal rather than a lasting short or open. GM's 2019 table 19OBDG02 evaluates windows of ten samples, one every 100 ms, by integrating the absolute value of each change; above 10 the window counts as failed, and 4 failed windows within 5 set the code, Type B, two trips. It needs more than 10.2 V supply and an active data link to the battery interface control module. The 2016 table 16OBDG02 already ran this jitter test, there with U179C as a blocking code. Mitsubishi assigns no erratic code to sensor [13]. Because readings can stay inside the valid band, P0CAF and P0CB0 often remain absent. Loose pins, a damaged sensor lead or a cracked board track are likely, and the fault may come and go with temperature or vibration.
P0CB1 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 P0CB1
- Intermittent warning lamp
- Sensor N value jumping in live data
Common causes of P0CB1
- Most likelyLoose or fretting pin in the sensor N circuit
- PossibleChafed or partly broken sensor N lead
- Less likelyCracked track on the monitoring board
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 nWiring harnessBms
What each part of P0CB1 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. |
| B1 | The exact fault in that area. |
What to do next
- Note P0CB1 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 P0CB1
What does P0CB1 mean?
P0CB1 means "Hybrid/EV Battery Temperature Sensor N Circuit Intermittent/Erratic". P0CB1 points to an unsteady sensor N signal rather than a lasting short or open. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CB1?
Drive gently and only to a workshop. With P0CB1 the car can go into limp mode (reduced power) to protect itself.
Will P0CB1 fail an emissions test?
Yes, it can. P0CB1 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 P0CB1 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0CB1 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.