P0C71 code meaning
Hybrid/EV Battery Temperature Sensor D/E Correlation
Powertrain system Generic code P0Cxx codes Check engine light
What P0C71 means
P0C71 checks whether battery temperature sensors D and E agree with each other. Both sit in the same pack, so after a long soak they should report almost the same value; a lasting gap means one of them reads wrong although its circuit looks healthy. No manufacturer documents P0C71 publicly. GM and Mitsubishi run this plausibility test against the pack average instead and log the single sensor: on the eAssist cars (13OBDG05C) GM flags sensor 4 (P0AE9) or sensor 5 (P0BC3) beyond 8.55 °C after more than 21,600 s off, Type B, while the 2022 Outlander PHEV tolerates 13 °C after one hour. P0C70 covers the C/D pair and P0C72 the E/F pair; open or shorted sensors set their own circuit codes.
P0C71 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P0C71
- Hybrid or EV system warning lamp
- Reduced battery charge and discharge power
- Battery cooling running more often than usual
Common causes of P0C71
- Most likelyThermistor D or E drifted while staying inside its electrical range
- PossibleSensor no longer pressed against its cell or module
- PossibleGenuine temperature difference from uneven cooling or a weak cell group
- Less likelyBattery management software with an overly tight comparison
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 dHv battery temp sensor eBms
What each part of P0C71 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. |
| 71 | The exact fault in that area. |
What to do next
- Note P0C71 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 P0C71
What does P0C71 mean?
P0C71 means "Hybrid/EV Battery Temperature Sensor D/E Correlation". P0C71 checks whether battery temperature sensors D and E agree with each other. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C71?
Drive gently and only to a workshop. With P0C71 the car can go into limp mode (reduced power) to protect itself.
Will P0C71 fail an emissions test?
Yes, it can. P0C71 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 P0C71 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P0C71 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.