P0659 Drive Power Circuit A High

P0659 – OBD-II Trouble Code Technical Description

Trouble code P0659 indicates that the voltage on the drive power supply circuit “A” is too high (compared to the value specified in the manufacturer’s specifications).

What does the fault code mean P0659?

Trouble code P0659 indicates that the voltage on the drive power supply circuit “A” is too high. This means that the powertrain control module (PCM) or other auxiliary modules in the vehicle have detected that the voltage in this circuit exceeds the manufacturer's acceptable levels. When this error occurs, the Check Engine light will turn on on your vehicle's dashboard to indicate that there is a problem. In some cases, this indicator may not light up immediately, but only after several error detections.

Possible reasons

Some possible reasons that could cause the P0659 trouble code to appear:

• Problems with wiring and connections: Opens, corrosion or poor contacts in the drive power supply “A” circuit can cause the voltage to be too high.
• Malfunctions in drive “A”: Problems with the drive itself or its components such as relays or fuses can result in incorrect voltage.
• Malfunctions in the PCM or other control modules: Malfunctions in the powertrain control module or other auxiliary modules may cause the voltage on the “A” circuit to be too high.
• Power problems: Improper operation of the battery, alternator, or other power system components may result in unstable voltage.
• Malfunctions in other vehicle systems: Problems in other systems, such as the engine management system, ABS system, or transmission control system, may also cause the voltage on circuit “A” to be too high.

Additional diagnosis by a qualified auto mechanic or electrical specialist is required to accurately determine the cause.

What are the symptoms of a fault code? P0659?

Symptoms for DTC P0659 may include the following:

• Check Engine Light: The appearance and illumination of the Check Engine light on your car's dashboard may be one of the first signs of a problem.
• Unstable engine performance: The engine may experience unstable operation, including shaking or rattling during operation.
• Loss of power: The vehicle may experience a loss of power or may not respond properly to the accelerator pedal.
• Unusual sounds or vibrations: Unusual sounds or vibrations may occur when the engine operates.
• Gear shifting problems: Vehicles with automatic transmission may experience problems shifting gears.
• Limitation of operating modes: Some vehicles may enter a limited operating mode to protect the engine or other systems.

These symptoms may occur in varying degrees and may depend on the specific cause of the problem. If these symptoms occur, it is recommended that you contact a qualified auto mechanic for diagnosis and repair.

How to diagnose a fault code P0659?

The following procedure is recommended to diagnose DTC P0659:

1. Using the Diagnostic Scanner: Connect the diagnostic scanner to the OBD-II port and read the error codes. Make sure the P0659 code is present and make a note of any other error codes that may accompany it.
2. Checking wiring and connections: Inspect the wiring and connections associated with the drive power supply circuit “A” for breaks, corrosion, or poor connections. Check the integrity of the wires and make sure that all connections are secure.
3. Measuring voltage: Using a multimeter, measure the voltage on circuit “A” of the drive power supply. Make sure the voltage meets the manufacturer's specifications.
4. Checking drive “A”: Carry out a thorough check of drive “A” for correct installation and possible malfunctions. If necessary, check the condition of relays, fuses and other drive components.
5. Checking the PCM and other control modules: Diagnose the PCM and other vehicle control modules for errors and problems related to signal processing from the “A” drive.
6. Checking the power supply: Check the stability and quality of the vehicle's power supply, including the condition of the battery, alternator and grounding system.
7. Additional tests and diagnostics: If necessary, perform additional tests and diagnostics to identify hidden problems or malfunctions that may be causing the P0659 code.
8. Use of specialized equipment: In some cases, it may be necessary to use specialized equipment for more detailed diagnostics and data analysis.

After diagnosing and identifying the cause, it is recommended to carry out the necessary repairs or replace components.

Diagnostic errors

When diagnosing DTC P0659, the following errors may occur:

• Insufficient wiring check: If the wiring and connections on the drive power supply “A” circuit are not properly checked for breaks, corrosion, or poor connections, the problem may be underdiagnosed.
• Faulty diagnostics of drive “A”: Incorrect or incomplete diagnosis of the “A” drive itself, including its components such as relays or fuses, can lead to erroneous conclusions.
• Misinterpretation of results: Inexperience or misinterpretation of voltage or other measurements may lead to incorrect conclusions about the cause of the error.
• Skipping Additional TestsNote: Not performing additional tests or diagnostics may result in missing hidden problems or faults that may be associated with the P0659 code.
• Problems in other systems: Ignoring possible problems or malfunctions in other vehicle systems that may cause the P0659 code may result in incorrect diagnosis and repair.

To avoid these errors, it is important to carry out a thorough and systematic diagnosis and, if necessary, consult a repair manual or consult a qualified auto mechanic. Using the right equipment and diagnostic techniques also plays an important role in preventing errors.

How serious is the fault code? P0659?

Trouble code P0659 can be serious because it indicates that the drive power supply A circuit is too high. Although the vehicle may continue to operate with this error, high voltage can cause a variety of problems, including overloading electrical components, improper operation of the engine and other vehicle systems, and damage to electrical components.

If the problem remains unresolved, it may cause further damage or failure to the engine and other vehicle systems. Moreover, if the P0659 code is present, other problems may occur, such as loss of power, rough running of the engine, or restriction of operating modes.

It is important to carry out diagnosis and repairs as soon as possible to prevent possible negative consequences for the safety and reliability of your vehicle.

What repair will help eliminate the code? P0659?

Resolving trouble code P0659 will require a number of steps depending on the cause of the error, but there are a few general steps that may help resolve the problem:

1. Checking and replacing wiring and connections: Carry out a thorough check of the wiring and connections in the drive power supply circuit “A”. Replace damaged wires or connections.
2. Checking and replacing drive “A”: Check the condition and correct installation of drive “A”. If necessary, replace it with a new or working copy.
3. Checking and replacing the PCM or other control modules: If the problem is due to a faulty PCM or other control modules, they may require replacement or reprogramming.
4. Checking and repairing power supplies: Check the condition of the battery, alternator and other power system components. Replace them or correct power problems as necessary.
5. Additional tests and diagnostics: Perform additional tests and diagnostics to identify hidden problems or malfunctions that may be associated with the P0659 code.
6. Reprogramming the PCM: In some cases, reprogramming the PCM may help resolve the problem, especially if the problem is software related.

Please remember that repairs will depend on the specific cause of the error and it is recommended that a thorough diagnosis be performed to determine what action is required. If you are not confident in your skills, it is better to contact a qualified auto mechanic or service for assistance.

How to Diagnose and Fix P0659 Engine Code - OBD II Trouble Code Explain

P0659 – Brand-specific information

Deciphering the fault code P0659 (“High voltage level in the drive power supply circuit “A””) for various brands of cars:

1. Chevrolet / GMC:
   • P0659: Drive "A" supply voltage circuit high.
2. Ford:
   • P0659: Drive power supply circuit “A” high.
3. Toyota:
   • P0659: Drive "A" supply voltage circuit high.
4. Volkswagen:
   • P0659: Drive power supply circuit “A” high.
5. Honda:
   • P0659: Drive power supply circuit “A” high.
6. BMW:
   • P0659: Drive "A" supply voltage circuit high.
7. Mercedes-Benz:
   • P0659: Drive power supply circuit “A” high.
8. Audi:
   • P0659: Drive "A" supply voltage circuit high.
9. Nissan:
   • P0659: Drive power supply circuit “A” high.
10. Hyundai:
    • P0659: Drive power supply circuit “A” high.

This code can occur due to a variety of reasons, including a short circuit, damaged wiring, faulty sensors, etc. Exact repair and diagnostic recommendations may vary depending on the specific vehicle model and circumstances.