P0CAE code meaning
Hybrid/EV Battery Temperature Sensor N Circuit Range/Performance
Powertrain system Generic code P0Cxx codes Check engine light
What P0CAE means
P0CAE is the plausibility check for sensor N: the value is electrically acceptable, yet out of line with its neighbours. GM's 2012 Volt table 12OBDG01A demands a rest of more than 21,600 s without propulsion, external charging or thermal conditioning and then fails the test at a deviation above 25.3 °C in 50 of 67 samples, Type B. The 2019 table 19OBDG02 keeps the count but uses 25.00 °C, 25 ms sampling and a minimum supply of 10.2 V. Mitsubishi's 2022 Outlander PHEV applies the code to module sensor [13] and checks it once per drive cycle after a one-hour soak: 13 °C or more away from the 50-sensor mean for 0.32 s. Electrical faults of N are reported separately as P0CAF and P0CB0.
P0CAE at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0CAE
- Warning lamp after the car has stood for hours
- Limited battery power
Common causes of P0CAE
- Most likelyThermistor N reading off while electrically valid
- PossibleSensor N detached from its cell or module surface
- Less likelyReal temperature difference in that pack section
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 P0CAE 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. |
| AE | The exact fault in that area. |
What to do next
- Note P0CAE 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 P0CAE
What does P0CAE mean?
P0CAE means "Hybrid/EV Battery Temperature Sensor N Circuit Range/Performance". P0CAE is the plausibility check for sensor N: the value is electrically acceptable, yet out of line with its neighbours. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CAE?
Drive gently and only to a workshop. With P0CAE the car can go into limp mode (reduced power) to protect itself.
Will P0CAE fail an emissions test?
Yes, it can. P0CAE 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 P0CAE to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P0CAE 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.