P0E48Hybrid/EV Battery Pack Voltage Sense E 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
- P0E48 marks pack voltage measurement E as unsteady: the signal jumps, drops out for fractions of a second or changes faster than a battery voltage can, and then returns to normal. Because the fault comes and goes, it is often found only as a stored code after a brief warning. No manufacturer documents P0E48 publicly, and GM's published hybrid tables, for example those of the 2013 two-mode trucks, test pack voltage only for low, high and rationality faults on channel A. CARB requires circuit monitoring of battery voltage sensors in the energy storage system. Steady faults of the same channel are P0E44 to P0E47; channel F uses P0E4D for this fault type. Loose or corroded sense terminals and chafed leads that react to vibration or heat are the usual suspects.
- What you may notice
- Warning light that comes and goes
- Brief losses of electric power, often on rough roads
- Stored code without a current fault
- Likely causes
- LikelyLoose, pushed-back or corroded terminal on the channel E sense lead
- PossibleChafed sense lead that shorts briefly under vibration
- RareIntermittent fault in the battery controller input
- 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.