P0620 High Powertrain

Generator Control Circuit

Common Causes

Failed alternator voltage regulator
Open or short in alternator control circuit
PCM generator control fault

Common Symptoms

Battery Drain Battery or Charging Light On

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Quick Info

Code P0620
System Powertrain
Severity High

Disclaimer

This information is for diagnostic guidance only. Always verify repairs with a qualified technician before performing safety-critical work.

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