P0695 Cooling system fan 3 control circuit low low

P0695 – OBD-II Trouble Code Technical Description

DTC P0695 indicates the cooling fan 3 motor control circuit voltage is too low.

What does the fault code mean P0695?

DTC P0695 indicates that the cooling fan 3 motor control circuit voltage is too low compared to the manufacturer's specifications. This means that the engine controller (PCM) has detected that the voltage in the circuit that controls the third cooling fan is below normal levels.

Possible reasons

Possible causes of the P0695 trouble code may include the following:

• Faulty fan motor: The motor may be faulty due to an open, short circuit or other damage, resulting in low voltage in the control circuit.
• Fan relay problems: A faulty relay that controls the fan motor can cause low voltage on the control circuit.
• Fuse problems: Damaged or blown fuses associated with the cooling fan control circuit can cause low voltage.
• Problems with wiring and connections: Breaks, corrosion or poor connections in the electrical circuit can cause low voltage.
• Malfunctions in the charging system: Problems with the alternator or battery can cause insufficient voltage in the vehicle's electrical system, including the cooling fan control circuit.
• Problems with the temperature sensor: A faulty engine temperature sensor may provide incorrect data, which may cause the cooling fan control circuit to become low.
• PCM malfunctions: Faults in the engine control module (PCM) itself, which controls the cooling fan, can also cause P0695.

What are the symptoms of a fault code? P0695?

Symptoms for DTC P0695 may include the following:

• Engine overheating: One of the most obvious symptoms is an increase in coolant temperature and overheating of the engine. This occurs due to insufficient cooling fan operation.
• High temperature on the dashboard: Engine temperature readings on the instrument panel may show a significant increase in temperature, which may be due to insufficient cooling.
• Performance limitation: In some cases, the vehicle may limit its performance to prevent the engine from overheating. This can manifest itself in worsening driving dynamics and acceleration.
• The fan does not work adequately or does not work at all: You may notice that the cooling fan does not operate adequately or does not turn on at all, resulting in insufficient engine cooling.
• DTC appears: In case the vehicle is equipped with OBD-II diagnostic system, trouble code P0695 may appear on the instrument panel.

These symptoms may appear alone or in combination with each other.

How to diagnose a fault code P0695?

To diagnose DTC P0695, you can follow these steps:

1. Visual inspection: Check the electrical wiring, connectors and connections related to the fan motor, relays and fuses. Look for damage, corrosion, or broken wires.
2. Fan motor testing: Check the operation of the fan motor by supplying voltage directly from the battery. Make sure the motor is functioning properly.
3. Checking relays and fuses: Check the condition of the relay that controls the fan motor and the fuses associated with the cooling system. Make sure the relay activates when needed and that the fuses are intact.
4. Temperature sensor test: Check the operation of the coolant temperature sensor. Make sure it is reporting correct engine temperature data.
5. Using the Diagnostic Scanner: Connect the vehicle to an OBD-II diagnostic scanner to read DTC P0695 and other related codes, and check the cooling system performance parameters in real time.
6. Checking the charging system: Check the condition of the alternator and battery to ensure that the charging system is providing sufficient voltage for the cooling system to operate properly.
7. Additional tests: Depending on the diagnostic results, additional tests may be required, such as checking for corrosion or open circuits, and checking the functionality of the PCM.
8. Contact a specialist: If the cause of the malfunction cannot be determined or eliminated independently, it is recommended that you contact a qualified auto mechanic or auto repair shop for further diagnosis and repair.

Diagnostic errors

When diagnosing DTC P0695, the following errors may occur:

• Incomplete fan motor testing: Failure to fully test the fan motor for proper operation may miss faults that may be the root cause of the problem.
• Ignoring electrical components: Failure to thoroughly check electrical components such as relays, fuses and wires may result in problems in the control circuit being missed.
• Insufficient temperature sensor check: The temperature sensor can cause low voltage in the control circuit, so insufficient testing of its functionality may lead to erroneous conclusions.
• Incorrect interpretation of diagnostic results: Incorrect interpretation of diagnostic data may lead to incorrect conclusions about the condition of the cooling system.
• Skipping a thorough charging system check: If the condition of the alternator and battery is not checked, the cause of insufficient voltage in the control circuit may be missed.
• Ignoring other related DTCs: P0695 may be associated with other trouble codes that may further clarify the cause of the problem. Ignoring these codes may result in a misdiagnosis.
• Failure to use specialized equipment: Failure to use diagnostic scanners or other specialized equipment may result in an incomplete analysis of the cooling system condition.

To avoid these errors, it is important to follow a structured diagnostic methodology, conduct comprehensive testing of all components, and use specialized equipment when necessary.

How serious is the fault code? P0695?

Trouble code P0695, which indicates that the cooling fan 3 motor control circuit voltage is too low, is serious because it can cause the engine to overheat. An overheating engine can cause serious damage such as failed gaskets, overheating of the cylinder head, damaged pistons and other serious problems that may require costly repairs.

Moreover, since an overheated engine can cause an accident due to loss of vehicle control, cooling problems should be considered serious and should be corrected immediately.

If the P0695 code appears, it is recommended that you immediately contact a qualified auto mechanic or service center for diagnosis and repair to prevent possible serious engine damage and ensure safe driving.

What repair will help eliminate the code? P0695?

Troubleshooting DTC P0695 may require the following repairs:

1. Replacing the fan motor: If the fan motor is faulty due to a break, short circuit or other reasons, it should be replaced with a new, working one.
2. Checking and replacing the fan relay: A faulty relay that controls the fan motor can cause low voltage on the control circuit. Check its functionality and, if necessary, replace it with a new one.
3. Checking and replacing fuses: Check the condition of the fuses associated with the cooling system. If any of them is damaged or burnt out, replace it with a new one.
4. Checking and repairing the electrical circuit: Carry out a thorough check of the electrical circuit, including wires, connectors and connections. Repair any shorts, breaks or corrosion.
5. Checking the charging system: Check the condition of the alternator and battery to ensure that the charging system is providing sufficient voltage for the cooling system to operate properly.
6. Temperature sensor test: Check the operation of the coolant temperature sensor. Make sure it is reporting correct engine temperature data.
7. PCM Software Update (if needed)Note: In rare cases, a PCM software update may be required to resolve cooling system control problems.
8. Check and replace PCM (if necessary): If the PCM itself is faulty and cannot properly control the cooling system, it may need to be replaced.

After repair work is completed, it is recommended that the cooling system be tested and diagnosed using a diagnostic scanner to ensure that the problem has been successfully resolved and the P0695 trouble code no longer returns. If the cause of the malfunction cannot be determined or corrected independently, it is recommended that you contact a qualified auto mechanic or service center for further diagnosis and repair.

How to Diagnose and Fix P0695 Engine Code - OBD II Trouble Code Explain

P0695 – Brand-specific information

Trouble code P0695 may have different meanings depending on the vehicle manufacturer, some meanings for different brands:

1. Ford:
   • Description: The cooling fan control circuit voltage is too low.
2. Chevrolet / GMC:
   • Description: The cooling fan motor control circuit is low.
3. Toyota:
   • Description: The cooling fan motor control circuit voltage is too low.
4. Volkswagen/Audi:
   • Description: The cooling fan control circuit voltage is too low.
5. Honda:
   • Description: The cooling fan control circuit is low.
6. BMW:
   • Description: The cooling fan control circuit voltage is too low.
7. Mercedes-Benz:
   • Description: The cooling fan control circuit voltage is too low.

These are general descriptions, and the specific meaning of the P0695 code may vary depending on the model, year, and other factors. For more accurate information, it is recommended that you consult the service manual for your specific vehicle brand or contact a qualified auto mechanic.