P0E14Hybrid/EV Battery Pack Coolant Heater A Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Check engine light on
- Heater shut down by its own overheat protection
- Battery heating unavailable or erratic in cold weather
- Likely causes
- 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
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.