P0E14 code meaning
Hybrid/EV Battery Pack Coolant Heater A Control Circuit High
Powertrain system Generic code P0Exx codes Check engine light
What P0E14 means
P0E14 is logged when heater A's control wire sits too high, typically because it touches a supply voltage or because a pulled-up input has lost its connection. No manufacturer documents P0E14 publicly; GM's 2016 Volt reports open, ground and voltage faults of its heater transistor together as P1EC3 (Type B). The high case deserves care because, depending on the design, a line held at supply voltage can keep the heater energised against the controller's will. Heater makers guard against that: a patent now held by PTI EV Hybrid describes a battery coolant heater with a thermistor in its housing that cuts power when the coolant warms faster than a set rate. CARB requires circuit monitoring of battery heating outputs. P0E13 is the low counterpart, P0E12 the open circuit.
P0E14 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E14
- Check engine light on
- Heater shut down by its own overheat protection
- Battery heating unavailable or erratic in cold weather
Common causes of P0E14
- Most likelyCommand wire shorted to a supply or neighbouring live wire
- PossibleOpen connection on a pulled-up heater input reading as high
- PossibleOutput driver in the controller that will not switch off
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 heater aWiring harnessBms
What each part of P0E14 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 14 | The exact fault in that area. |
What to do next
- Note P0E14 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 P0E14
What does P0E14 mean?
P0E14 means "Hybrid/EV Battery Pack Coolant Heater A Control Circuit High". P0E14 is logged when heater A's control wire sits too high, typically because it touches a supply voltage or because a pulled-up input has lost its connection. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E14?
Drive gently and only to a workshop. With P0E14 the car can go into limp mode (reduced power) to protect itself.
Will P0E14 fail an emissions test?
Yes, it can. P0E14 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 P0E14 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P0E14 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.