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2020 MAZDA MAZDA3
2.5L Skyactiv-G I4 (186 hp)•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6478Fluid16DTC2264Battery2Maintenance0Recalls2
C0150high severityChassis

Regenerative Braking System Malfunction

on 2020 Mazda Mazda3 2.5L Skyactiv-G I4 (186 hp) · AWD

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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