P0CA4Hybrid/EV Battery Charging Voltage High
The HV battery charging voltage exceeds the safe upper limit. Risk of cell damage from overvoltage. Cell-group voltage monitoring is the foundation of HV battery safety — drift here triggers contactor opening, charge inhibit, and reduced power to protect the pack.
Can I keep driving? NO
STOP the vehicle in a safe place. Continuing to drive may cause serious engine damage or put your safety at risk.
Sistema Afectado
Sistema Híbrido / EV · Batería HV y motor eléctrico
Pertenece al sistema de alto voltaje: batería de tracción, inversor o motor eléctrico.
Espacio para vendedores de repuestos
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Symptoms You Will Notice
What you may observe when this code appears
- EV/hybrid system warning light on Reduced power output or limp mode Charging may fail or be slowed Reduced electric range
Possible Causes
The components or conditions that trigger this code
- 1Charger regulation off BMS disagrees with charger setpoint Pack cell imbalance approaching service threshold
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: hard. Estimated time: 3-14 hours. Estimated cost: €500-€
- 2Professional repair recommended
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
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