P0625 - GENERATOR FIELD / F TERMINAL CIRCUIT LOW

The DTC P0625 OBDII code means the PCM (Powertrain Control Module) has found a lower-than-expected voltage signal in the alternator field coil circuit.

The PCM monitors the continuity and voltage level of the generator field circuit whenever the vehicle is running. This coil is integral to alternator operation, as well as maintaining battery charge levels.

When a problem is detected in the generator circuit, this code will be set and the Check Engine light will turn on.

• MIL light turns on.
• Accidentally the engine shuts down.
• Delay in starting the engine.

Reasons for setting the P0625 OBD2 error code:

• The generator field controller circuit may be open or shorted.
• There may be a blown fuse.
• The alternator may be faulty.

To troubleshoot faults caused by the P0625 OBDII diagnostic code, please try this:

• Check all the wires leading to the alternator. Also, inspect the fuses. For any component that has problems, you should make the necessary repairs or replace the component.
• Check that the battery has enough charge. Check with the manufacturer's recommended specifications for minimum and maximum voltage output for the battery and alternator.
• Check for battery voltage at the alternator field controller circuit. To do this, use the wiring diagram and a DVOM.
• Replace the ground strap on the control module.