P2E76 code meaning
Hybrid/EV Battery Pack Coolant Temperature Sensor D Circuit Low
Powertrain system Generic code P2Exx codes Check engine light
What P2E76 means
P2E76 reports that the voltage on battery coolant sensor D has dropped below its lower limit. Because these sensors are NTC thermistors whose resistance falls as they warm, a low voltage stands for very hot coolant, and a grounded signal wire or a sensor with an internal short produces exactly that picture. No manufacturer documents P2E76 publicly. GM's comparable sensor B code, P0CD7, sets at a reading of 87.9 °C or more, equal to an ADC count of 130 or less, for 1.75 s within a 2.5 s window; the 2016 ELR table marks it two-trip. Coolant genuinely that hot in a battery loop is rare, so suspect wiring first. CARB requires out-of-range detection for battery thermal inputs. The high-voltage counterpart is P2E77.
P2E76 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E76
- Hybrid or check engine warning
- Cooling may run at full effort or power may be cut back
Common causes of P2E76
- Most likelySignal wire of sensor D shorted to ground
- PossibleSensor D shorted internally, for example after coolant entered it
- Less likelyActual overheating of the battery coolant loop
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery pack coolant temp sensor dWiring harnessBms
What each part of P2E76 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 76 | The exact fault in that area. |
What to do next
- Note P2E76 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 P2E76
What does P2E76 mean?
P2E76 means "Hybrid/EV Battery Pack Coolant Temperature Sensor D Circuit Low". P2E76 reports that the voltage on battery coolant sensor D has dropped below its lower limit. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E76?
Drive gently and only to a workshop. With P2E76 the car can go into limp mode (reduced power) to protect itself.
Will P2E76 fail an emissions test?
Yes, it can. P2E76 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 P2E76 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2E76 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.