P0E4DHybrid/EV Battery Pack Voltage Sense F Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0E4D flags pack voltage measurement F as intermittent: short dropouts, spikes or steps that a real high-voltage battery cannot make, followed by normal readings again. Where a vehicle cross-checks several voltage sensors, as GM does in its 2019 hybrids between the pack sensor and the inverter or charger bus (P0AF8), such glitches can also surface as correlation faults. No manufacturer documents P0E4D publicly. Under CARB rules the storage system's voltage sensors must be watched for circuit faults. Permanent faults of channel F are P0E49 to P0E4C, the same fault type on channel E is P0E48. Typical triggers are loose sense terminals, corrosion inside connectors and leads that move with vibration, so the symptoms appear and vanish.
- What you may notice
- Intermittent warning light
- Sporadic power limitation
- Additional correlation codes stored
- Likely causes
- LikelyLoose or corroded terminal in the channel F sense circuit
- PossibleSense lead that loses contact when the harness moves
- RareInterference or intermittent fault in the measuring electronics
- 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 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.