What it means
The code indicates deterioration in hybrid/EV battery pack subsection L. The specific degradation measure and threshold depend on the vehicle.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The hybrid or EV battery is divided into monitored sections, including section L. The battery control module evaluates section L using vehicle-specific measurements and sets this code when they show deterioration beyond its calibrated limit.
Common causes
Most likely first.
- Cell aging
- Repeated exposure to high or low temperatures
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
How to diagnose it
- Save freeze-frame data and scan all hybrid or EV battery codes first, since related section or temperature faults can help explain the warning.
- Compare live data for section L with other battery sections under the same conditions to see whether L shows an outlying condition.
- Check battery temperature history and cooling-system data for evidence of repeated heat or cold exposure affecting section L.
- Inspect accessible battery cooling ducts, fans, and connectors for blockage, damage, or signs of overheating, following the vehicle's high-voltage safety procedure.
- Have the battery control system run its specified capacity or deterioration test to confirm whether section L has aged beyond the manufacturer's specification.
Common fixes
- Clear cooling-duct or fan obstructions and repair any cooling-system fault affecting the battery.
- Repair a damaged or poorly connected battery sensor or wiring connection identified during inspection.
- Replace or service the affected battery section if vehicle-specific testing confirms deterioration and the design permits it.
Can I keep driving?
Reduced power, limited operation, or charging problems may worsen, so avoid long trips and demanding acceleration. If the vehicle displays a high-voltage or stop warning, follow its instructions and arrange prompt service.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.