P0E49Hybrid/EV Battery Pack Voltage Sense F Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Channel F is the sixth and last pack voltage measurement in this series and comes after channel E (P0E44 to P0E48). P0E49 is its general circuit fault: the battery controller cannot use the input, for instance because the sense line is open, the measuring chip reports an internal error or the raw value is missing, while no clear low, high or erratic pattern applies. No manufacturer documents P0E49 publicly. Systems that compare several high-voltage measurements, as GM's 2019 hybrids do between the pack sensor and the inverter and charger bus voltages, depend on every channel being valid. CARB requires all battery voltage sensors of the storage system to be monitored. The vehicle typically limits or refuses high-voltage operation.
- What you may notice
- High-voltage warning and reduced power
- Vehicle may refuse to become ready
- Likely causes
- LikelyOpen sense lead or disconnected connector of channel F
- PossibleInternal fault of the voltage measuring chip or battery controller
- RareMoisture or corrosion in the pack-side connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.