P0665 Intake manifold tuning valve control circuit bank 2 high

P0665 – OBD-II Trouble Code Technical Description

Intake manifold tuning valve control circuit high bank 2

What does the fault code mean P0665?

This is a common transmission diagnostic trouble code (DTC) that is often used with OBD-II vehicles. Vehicle brands where it can be used include Saturn, Land Rover, Porsche, Vauxhall, Dodge, Chrysler, Mazda, Mitsubishi, Chevy, Honda, Acura, Isuzu, Ford and others. The Engine Control Module (ECM) is responsible for monitoring and tuning the vehicle's sensors and systems, including the intake manifold tuning valve. This valve has various functions including regulating pressure and changing the air flow in the engine. The P0665 code indicates high power in the bank 2 intake manifold tuning valve control circuit, which can be caused by a variety of problems, including mechanical or electrical valve failure.

Possible reasons

Causes of a P0665 code may include:

1. The intake manifold adjustment valve is faulty.
2. Broken valve parts.
3. Stuck valve.
4. Extreme cold.
5. There is a problem with the wiring (such as fraying, cracking, corrosion, etc.).
6. Broken electrical connector.
7. Faulty PCM driver.
8. Loose control module grounding belt.
9. Broken control module ground wire.
10. The fuel injector control module is faulty.
11. In rare cases, the PCM or CAN bus is faulty.
12. Electrical components in the PCM or CAN bus (controller area network) are damaged.

What are the symptoms of a fault code? P0665?

The P0665 code is accompanied by a Check Engine light that illuminates on the dashboard. This may indicate problems with the engine and transmission, such as rough idling, hesitant or slow acceleration, and constant stalling when idling. There may also be a decrease in fuel consumption. Symptoms of a P0665 code include poor engine performance, loud clicking sounds from the engine compartment, decreased fuel economy, and possible misfire when starting.

How to diagnose a fault code P0665?

The first step in troubleshooting is to review the Technical Service Bulletins (TSBs) for known vehicle problems. Further diagnostic steps are required, depending on the specific vehicle model and may require special equipment and knowledge. Basic steps include:

1. Clearing all DTCs (Diagnostic Trouble Codes) after they have been activated and checking for reoccurrence.
2. Locate and check the intake manifold tuning valve for damage.
3. Using an OBD2 code reader/scanner to control the valve and check its operation.
4. Physically inspect the valve and interior of the intake manifold for obstructions.
5. Checking the wiring harnesses associated with the tuning valve.
6. Consider the ECM (engine control module), especially when unrelated codes are activated or appear intermittently.
   Be sure to refer to the technical data and service bulletins for your vehicle before performing any repairs or diagnostics.

Diagnostic errors

When diagnosing a P0665 code, a common mistake is not following the OBD-II diagnostic protocol correctly. To diagnose and repair efficiently and accurately, mechanics must strictly follow a step-by-step protocol.

The P0665 code is usually accompanied by numerous other trouble codes, many of which may be the result of misinterpretations left behind after diagnosis. Sometimes these codes are misdiagnosed and cleared before the P0665 code appears, although it may later appear on the scan tool.

How serious is the fault code? P0665?

Trouble code P0665 can be severe or less severe depending on the specific situation and why it occurs. This code indicates a problem with the intake manifold tuning valve on engine bank 2. The consequences of this fault can vary:

1. If the intake manifold tuning valve is not working properly, it can affect engine performance, including engine performance and efficiency.
2. If the symptoms associated with the P0665 code are left unaddressed and not corrected, it can result in poor fuel economy and rough engine performance.
3. In rare cases, problems with the intake manifold tuning valve can cause other problems in the engine management system.

Overall, it is necessary to take the P0665 code seriously and have it diagnosed and repaired to avoid reduced vehicle performance and additional damage. It is recommended that you contact a qualified mechanic or authorized service center to make the necessary repairs to correct the problem.

What repair will help eliminate the code? P0665?

The following repairs may be required to resolve DTC P0665:

1. Updating your PCM (engine control module) drivers may be the first step to try to fix the problem, especially if the cause is due to software bugs.
2. Reprogramming the PCM may be necessary to restore its operation and communication with the intake manifold tuning valve.
3. Replacing the ground bars and ground cables can help if there are electrical connection problems.
4. Replacement of cables, fuses and connectors may be necessary if damage is found in the wiring or connections.
5. The fuel injector control module may need to be replaced if it is associated with the problem.
6. In rare cases, replacing the PCM or CAN bus may be unavoidable if other measures do not correct the problem.

Repair actions are selected based on more detailed diagnostics, and it is recommended that you contact a qualified mechanic or authorized service center to determine the specific cause and perform the necessary repairs.

What is P0665 Engine Code [Quick Guide]

P0665 – Brand-specific information

Code P0665 is “Intake Manifold Tuning Valve Control Circuit Bank 2 High”. This code can apply to various makes of vehicles, including:

1. Saturn - Loads the coils that induce sparks on the second bank of cylinders.
2. Land Rover - Linked to the intake valve control system.
3. Porsche – Code P0665 may indicate problems with the second row of cylinders.
4. Vauxhall - Bank 2 intake manifold valve control circuit reports high power.
5. Dodge – May indicate problems with the intake manifold tuning valve on the second row.
6. Chrysler - Associated with high power intake manifold tuning valve control circuit on the second row.
7. Mazda - Indicates problems with the intake manifold tuning valve in bank 2 cylinders.
8. Mitsubishi - Refers to the high power intake manifold tuning valve control circuit.
9. Chevy (Chevrolet) – Associated with a problem with the intake manifold tuning valve on the second bank of cylinders.
10. Honda – May indicate high power intake manifold tuning valve control circuit.
11. Acura – Refers to problems with the intake manifold tuning valve on bank 2 cylinders.
12. Isuzu – Reports high power in the intake manifold tuning valve control circuit.
13. Ford - May indicate high power in the intake manifold tuning valve control circuit on the second bank of cylinders.

Please note that the specific codes and meanings may vary slightly depending on the model and year of your vehicle, so it is always a good idea to check the technical documentation for your vehicle's specific make and model for an accurate interpretation of the P0665 code.