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P0625 is a diagnostic trouble code (DTC) for "Generator Field/F Terminal Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
When code P0625 is stored it means that a problem in the generator field control circuit has been detected by either the PCM or a supporting control module.
This code means that something has gone wrong with the generator field control circuit. Examples of control modules that may catch this problem include, but are not limited to the antilock brake control module, the body control module, the alternative fuel control module, the instrument panel control module, the turbo control module, the fuel injection control module, the cruise control module, the anti-theft module, the proximity alert module, the traction control module and the climate control module.
Depending on the module that catches it, though, it could take as many as eight incidents before the Check Engine Light is activated.
The P0625 code is unique because, unlike the majority of other PCM codes, this one is usually caused by a defective generator or a problem with the generator control module. Many of the circuits for the generator control are incorporated into the PCM.
Other possible causes include:
Symptoms that indicate a P0625 code may have been stored include a tough time shifting. The engine may even stall or you might find that it begins to vibrate or make a weird noise when you’re in idle.
A discharged battery could also occur. There are a number of other drivability issues that will tell you something is wrong too. Accelerating is usually difficult after this code is stored and fuel efficiency will most likely suffer too.
If the module that catches it needs several incidents before it will store the code, it may still record a pending for the original one.
Your mechanic will begin by finding out which codes have been stored. An OBD-II scanner will be sufficient for this job. Then they’ll most likely move onto visually inspecting all of the wires and connectors. They’ll do the same for the control modules as well.
The CAN (Controller Area Network) may need to be inspected too. This could involve disconnecting every single pin to do so, which would mean using a diagnostic CAN scanner and a memory-saving device.
This code can represent a lot of different underlying issues with communication. Unfortunately, the symptoms often get diagnosed as the problems and the focus of repairs. Doing so leaves the main problem unfixed. Diagnose and repair codes in the order in which they were stored. Utilizing freeze frame data will help with this.
The heart of the problem relates to the CAN. To put it simply, the CAN control practically every electrical function that occurs within your vehicle. The PCM serves as the primary controller. Therefore, if you let this problem continue, it’s only a matter of time before more and more symptoms begin popping up.
The exact steps your mechanic takes will depend on the specifics of the codes that were stored. However, they will most likely:
Just remember that after each repair, you need to reset the system to see if any other problems are out there. Anything that happens to the CAN could make a number of other things go wrong.
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