What it means
The code indicates deterioration in hybrid/EV battery pack subsection K. 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, and section K is one of them. The battery control module tracks section K's condition using vehicle-specific measurements; it sets this code when those measurements indicate 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 K with other battery sections under the same conditions to see whether K shows an outlying condition.
- Check battery temperature history and cooling-system data for evidence of repeated heat or cold exposure affecting section K.
- 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 K 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.