What this code means

The electric turbocharger or electric compressor motor has an electrical fault. E-turbos eliminate turbo lag by using an electric motor to spool the compressor.

Symptoms

• Check Engine Light
• Turbo lag returns (no electric assist)
• Reduced low-RPM torque
• 48V system warning may accompany
• E-compressor noise absent
• Slower throttle response

Common causes

• E-compressor motor winding failure
• Inverter circuit fault
• 48V power supply insufficient
• Motor bearing failure
• Overtemperature shutdown

Diagnostic steps

1. Read e-compressor fault codes
2. Check 48V supply to e-compressor
3. Test motor phase resistance
4. Monitor motor temperature
5. Command e-compressor operation via scan tool

Repair notes

Replace e-compressor motor or inverter assembly. Check 48V system health. These are typically found on 48V mild hybrid systems.

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