P0E13
Hybrid/EV Battery Pack Coolant Heater A Control Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check and repair any wiring or connection issues related to the hybrid/EV battery pack coolant heater control circuit.
- Inspect and replace any faulty control circuit components, such as relays, fuses, or sensors.
- Verify and rectify any cooling system malfunctions that may be causing the control circuit/open issue, such as a faulty coolant pump or a low coolant level.
- If all other solutions fail, consider replacing the hybrid/EV battery pack coolant heater unit itself.
Common causes
Most likely first
- Faulty coolant heater control circuit
- Malfunctioning coolant heater relay
- Issue with the coolant heater temperature sensor
- Faulty wiring or connection in the coolant heater control circuit
How to diagnose & fix
Work through it in order
- Battery not reaching operating temperature
- Loss of power or reduced performance
- Illuminated warning Light
Read & clear P0E13 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.