P0625 | p0625 generator field/f terminal circuit low | code p0625 | p0625 obd2

P0625 | p0625 generator field/f terminal circuit low | code p0625 | p0625 obd2

Hello friends welcome to the ig garage channel today I am telling you how to fix p0625 generator field/f terminal circuit low so watch this video and learn how to fix it friends if you like this video then subscribe to the ig garage channel for more videos.

The P0625 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the generator (alternator) field or F-terminal circuit. This circuit controls the alternator’s field current, which is crucial for regulating the charging system. A low signal can lead to undercharging, electrical issues, or battery drain.

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⚠ Symptoms of P0625:

Check Engine Light (CEL) ON

Battery warning light illuminated

Weak or dead battery

Dimming headlights or interior lights

Engine stalling or poor performance

Electrical accessories (radio, AC, windows) malfunctioning

🔍 Common Causes:

Faulty alternator (generator)

Damaged, corroded, or loose wiring/connectors in the F-terminal circuit

Faulty voltage regulator (often built into alternator)

Weak or dead battery

PCM/ECM malfunction (rare)

🛠 Possible Fixes:

Inspect wiring and connectors in the F-terminal circuit.

Test the alternator output and replace if faulty.

Repair or replace damaged connectors or wires.

Check and replace a weak or dead battery.

Repair or replace the voltage regulator if needed.

Reprogram or replace the PCM/ECM as a last resort.

📍 Location of Generator (Alternator) & F-Terminal:

Alternator is mounted at the front of the engine, driven by the serpentine belt.

The F-terminal connector is typically on the back of the alternator and links to the PCM.

💰 Estimated Repair Costs:

Alternator replacement: $300 – $800

Wiring/connectors repair: $100 – $300

Battery replacement: $100 – $250

Voltage regulator repair/replacement: $150 – $400

PCM replacement (rare): $800 – $2000

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