P0E13Hybrid/EV Battery Pack Coolant Heater A Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0E13 is the low-signal case on the command line of battery coolant heater A: the controller reads the line near ground at a moment when it expects a higher level, which points to a short to ground or a driver that cannot pull the circuit up. No manufacturer documents P0E13 publicly. GM's 2016 Volt folds open circuit, ground short and voltage short of its battery heater transistor into the single code P1EC3, rated Type B. Keep this low-voltage command fault apart from an isolation fault of the high-voltage heater element: GM bulletin PIC5920B lists the battery heater of the 2011–2014 Volt and 2014 ELR as one possible cause of isolation codes. CARB requires circuit checks on battery heating outputs. With the heater stuck off, winter charging slows down. P0E12 is the open circuit, P0E14 the high case.
- What you may notice
- Check engine light on
- Battery heater does not work at low temperatures
- Longer charging times in winter
- Likely causes
- LikelyCommand wire shorted to ground, e.g. chafed against the body
- PossibleMoisture or coolant in the heater connector
- PossibleInternal short in the heater's control input
- RareOutput driver in the controller stuck low
- 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.