What this code means

General fault in the regenerative braking system that recovers energy during deceleration.

Symptoms

• Regenerative braking warning light
• Reduced fuel economy
• Braking feel changes
• Battery not charging during braking

Common causes

• Hybrid battery state-of-charge issue
• Inverter malfunction
• Motor-generator fault
• Communication error between brake and hybrid modules

Diagnostic steps

1. Check hybrid battery SOC and health
2. Scan hybrid powertrain module for related codes
3. Test motor-generator output during braking
4. Verify CAN communication between brake and hybrid modules
5. Check for high-voltage isolation faults

Repair notes

Diagnose hybrid powertrain system. Regenerative braking requires a healthy battery and motor-generator system.

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