P2E37Battery Charger B Enable Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E37 is stored when the enable line of charger B carries more voltage than its commanded state allows, typically because it touches a powered wire or the driver in the commanding module is stuck on. No manufacturer documents P2E37 publicly. The effect differs from P2E36: on an active-high wake line the charger is told to stay awake although no charging is planned. Lear's patent on a wake-by-pilot circuit points out why that hurts, since the charger is meant to sleep together with the whole car to keep the 12 V battery healthy, so a stuck enable can drain it overnight. The control unit may also lose the ability to switch charger B off by hardware. GM's 2016 Volt tables list only the general A-side enable fault P0E61. Low is P2E36, charger A high P0E63.
- What you may notice
- 12 V battery discharged after standing
- Charger B fan or pump runs with nothing plugged in
- Charging via charger B disabled
- Likely causes
- LikelyEnable wire shorted to a 12 V feed
- PossibleEnable driver in the commanding module stuck on
- RareInternal leakage in the charger B input circuit
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.