P2AD4 — Intermediate System Voltage Low
The intermediate (DC-link) system voltage in the hybrid power electronics is below the expected window. Common in HEV/EV inverter circuits when the DC bus drops under load.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Dc link capacitor
- Hv battery
- Inverter
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- HV battery output low under load
- DC-link capacitor aged - increased ESR
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.