P0E4AHybrid/EV Battery Pack Voltage Sense F Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0E4A reports that pack voltage measurement F lies within its electrical range but disagrees with a reference value. No manufacturer documents P0E4A publicly. GM's 2019 hybrid tables show two plausibility checks such a channel could face: P0ABB fails when pack voltage and the summed cell voltages differ by more than 12 V in 20 of 25 samples at 25 ms, and P0AF8 compares the pack sensor with the inverter bus voltage, failing at more than 13.95 V difference in 400 of 500 samples, or at more than 14.95 V against the charger bus. Both are Type A, so the MIL comes on in the first trip. CARB requires rationality monitoring of battery voltage sensors. The electrical faults of channel F are P0E49, P0E4B and P0E4C; channel E uses P0E45.
- What you may notice
- MIL on in the first trip with reduced battery power
- Implausible state of charge display
- Likely causes
- LikelyContact resistance at a sense terminal distorting the channel F value
- PossibleFault in the comparison value, such as the inverter bus or cell voltage measurement
- RareMeasuring drift or software issue in the battery controller
- 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.