P0660 Intake manifold control solenoid valve circuit malfunction (bank 1)

P0660 – OBD-II Trouble Code Technical Description

Trouble code P0660 indicates a malfunction in the intake manifold control solenoid valve circuit (bank 1).

What does the fault code mean P0660?

Trouble code P0660 indicates a problem in the intake manifold control solenoid valve circuit (bank 1). This system changes the shape or size of the intake manifold based on engine operating conditions to optimize engine performance. The presence of P0660 usually means that the engine control module (PCM) has detected an incorrect or missing signal from the intake manifold control solenoid valve.

This may result in engine malfunction, poor performance, loss of power, and increased fuel consumption.

Possible reasons

Some of the possible reasons that could cause the P0660 trouble code to appear are:

• Solenoid valve failure: The solenoid valve itself may be damaged or malfunctioning, causing the intake manifold geometry modification system to not operate properly.
• Wiring and Connectors: Wiring, connections or connectors associated with the solenoid valve may be damaged, broken or oxidized, resulting in incorrect signal transmission.
• Malfunction in PCM: The engine control module (PCM), which controls the operation of the solenoid valve, may have problems, causing the fault to be erroneously detected and coded.
• Loss of vacuum: If the intake manifold variable geometry system uses vacuum to control the valve, loss of vacuum due to leaks or a malfunction of the vacuum system can also cause the P0660 code to appear.
• Sensor malfunction: Malfunction of sensors that monitor the operation of the intake manifold geometry changing system, such as position or pressure sensors, can lead to this error.

To accurately determine the cause and eliminate the problem, it is recommended to contact a professional auto mechanic or service center, where they will diagnose and perform the necessary repair work.

What are the symptoms of a fault code? P0660?

Symptoms for DTC P0660 may include the following:

• Loss of power: Engine performance may deteriorate due to improper functioning of the intake manifold geometry modification system.
• Unstable idle: Unstable idle speed may occur due to improper operation of the intake manifold geometry modification system.
• Unusual engine sounds: Unusual sounds or knocking noises may occur due to the engine not operating properly due to a faulty solenoid valve.
• Increased fuel consumption: Due to improper operation of the intake manifold geometry modification system, the engine may consume more fuel, resulting in an increase in fuel consumption per kilometer.
• Ignition Check Engine: The appearance of the Check Engine Light on your dashboard is one of the most common symptoms of the P0660 code.
• Uneven engine operation: The engine may run rough or unstable due to improper operation of the intake manifold geometry modification system.

It is important to note that specific symptoms may vary depending on the specific make and model of the vehicle, as well as the extent of the problem. If you notice one or more of these symptoms, it is recommended that you contact a qualified mechanic to diagnose and repair the problem.

How to diagnose a fault code P0660?

To diagnose DTC P0660, follow these steps:

1. Checking DTCs: Use a scan tool to read trouble codes from the engine management system. Check to see if there is a P0660 code and, if necessary, write down other codes that may be related to it.
2. Visual inspection: Inspect the intake manifold control solenoid valve and surrounding components for visible damage, corrosion, or disconnected connectors.
3. Checking wiring and connectors: Inspect the wiring, connections and connectors associated with the solenoid valve for damage, breaks or oxidation. Make sure all connections are secure.
4. Solenoid Valve Testing: Using a multimeter, check the resistance of the solenoid valve. Typically, for a normal valve, the resistance should be within a certain range of values. Also check that the valve operates correctly when voltage is applied.
5. Checking the vacuum system (if equipped): If the intake manifold variable geometry system uses vacuum for control, check the vacuum hoses and connections for leaks or damage.
6. Checking the Engine Control Module (PCM): If necessary, check the engine control module (PCM) for software errors or malfunctions that could cause P0660.
7. Additional tests: Perform additional tests specified in the service manual for your specific vehicle to ensure diagnostic accuracy.

After completing the above steps, you can accurately determine the cause of the P0660 code and begin the necessary repair actions. If you do not have the necessary experience or tools to diagnose and repair, it is recommended that you contact a qualified mechanic or auto repair shop.

Diagnostic errors

When diagnosing DTC P0660, the following errors may occur:

• Incorrect interpretation of code: Sometimes mechanics may misinterpret the P0660 trouble code, which can lead to incorrect diagnosis and repair.
• Incomplete diagnosis: Sometimes certain diagnostic steps may be skipped, which may lead to missing key factors influencing the problem.
• No need to replace parts: Mechanics may be prone to replacing components such as a solenoid valve without conducting a full diagnosis, which can result in unnecessary repair costs.
• Ignoring other possible problems: Some mechanics may focus on only one part of the system, ignoring other potential problems that may be associated with the P0660 code.
• Incorrect programming or setting: If the diagnosis does not take into account the need to properly configure or program components after they are replaced, this can also lead to additional problems.
• Incorrect replacement of parts: If components such as wiring or connectors are incorrectly installed or replaced, a new problem may occur or an existing problem may not be corrected.
• Insufficient training and experience: Some mechanics may not have the knowledge and experience to effectively diagnose and repair the P0660 code.

To avoid these mistakes, it is important to contact a qualified and experienced mechanic or service center who has experience with the problem and can provide professional diagnosis and repair.

How serious is the fault code? P0660?

Trouble code P0660, associated with the intake manifold geometry control solenoid valve, is quite serious as it can lead to a number of problems with engine operation and performance. Here are a few reasons why this code should be taken seriously:

• Loss of power and efficiency: Incorrect operation of the intake manifold variable geometry system may result in loss of engine power and poor performance. This can affect the acceleration and overall performance of the vehicle.
• Increased fuel consumption: Incorrect operation of the intake manifold geometry modification system may result in increased fuel consumption. Not only can this be costly, but it can also lead to negative environmental impacts.
• Negative impact on the environment: Increased fuel consumption can also lead to increased emissions of harmful substances into the atmosphere, which has a negative impact on the environment.
• Engine damage: If the problem with the variable intake manifold solenoid valve is not resolved in time, it can cause additional stress on other engine components, which can eventually cause them to fail.
• Failure to comply with toxicity standards: In the event of increased emissions caused by improper engine operation, the vehicle may not meet emission standards, which may result in fines or a ban on operation in some territories.

Based on the above, the P0660 trouble code should be taken seriously and corrective action taken immediately to maintain the reliability, performance and environmental safety of your vehicle.

What repair will help eliminate the code? P0660?

Troubleshooting the P0660 trouble code may involve several potential actions, depending on the specific cause of the code. Here are some possible repair methods:

1. Replacing the solenoid valve: If the solenoid valve of the intake manifold geometry changing system is faulty or damaged, it should be replaced with a new and working one. This may require removal and disassembly of the intake manifold.
2. Checking and repairing wiring and connectors: Check the wiring, connections and connectors associated with the solenoid valve for damage, corrosion or breaks. If necessary, repair or replace damaged components.
3. Diagnostics and repair of the vacuum system: If the intake manifold variable geometry system uses vacuum for control, check the vacuum hoses and connections for leaks or damage. If problems are found, they can be repaired or replaced.
4. Reprogramming or software update: Sometimes the problem may be related to the engine control module (PCM) software. In this case, it may be necessary to reprogram or update the software followed by testing.
5. Additional diagnostics and repairs: If the cause of the P0660 code cannot be immediately detected, a more in-depth diagnosis may be required, including testing other systems or components related to the operation of the intake manifold.

Remember that effective P0660 code repair requires accurate diagnosis and determination of the source of the problem. Therefore, it is important to contact a qualified mechanic or service center to diagnose and perform any necessary repairs.

How to Diagnose and Fix P0660 Engine Code - OBD II Trouble Code Explain

P0660 – Brand-specific information

Trouble code P0660 indicates a problem with the intake manifold geometry control solenoid valve, and the code for some specific vehicle brands is:

1. Chevrolet / GMC:
   • P0660: Intake Manifold Control Valve Control Loop Open (Bank 1)
2. Ford:
   • P0660: Intake manifold tuning valve control circuit open (bank 1)
3. Toyota:
   • P0660: Intake Manifold Control Valve Control Loop Open (Bank 1)
4. Volkswagen:
   • P0660: Intake manifold tuning valve control circuit open (bank 1)
5. Honda:
   • P0660: Intake Manifold Control Valve Control Loop Open (Bank 1)
6. BMW:
   • P0660: Intake Manifold Control Valve Control Loop Open (Bank 1)
7. Mercedes-Benz:
   • P0660: Intake manifold tuning valve control circuit open (bank 1)
8. Audi:
   • P0660: Intake manifold tuning valve control circuit open (bank 1)
9. Nissan:
   • P0660: Intake Manifold Control Valve Control Loop Open (Bank 1)
10. Hyundai:
    • P0660: Intake manifold tuning valve control circuit open (bank 1)

This is the decoding of the P0660 code for various car brands. Please note that although the code has the same meaning for different makes of vehicles, the specifications and repair recommendations may vary slightly depending on the model and year of the vehicle.