Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part in your car's engine that helps control air flow, making it hard for the engine to work properly.
The P0665 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the circuit controlling the intake manifold tuning valve on the second bank of the engine.
The intake manifold tuning valve is responsible for optimizing the air flow into the engine cylinders to improve performance and efficiency. When the PCM detects a voltage that is higher than expected in the control circuit of this valve on bank 2, it triggers the P0665 code. Bank 2 refers to the side of the engine that does not contain cylinder number 1.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty intake manifold tuning valve
• Wiring issues such as open or short circuits
• Faulty PCM
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
Intake Manifold: Part of the engine that distributes air to the cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors related to the intake manifold tuning valve.
• Test the intake manifold tuning valve for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the intake manifold tuning valve if faulty.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Screwdrivers
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain engine wiring.
• Ensure timely servicing of the intake system.
• Avoid harsh driving conditions that can stress engine components.
Engine Performance
• Do not ignore the Check Engine Light.
• Have a professional diagnose the issue to avoid further damage.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code has been associated with issues in vehicles with complex intake systems that use tuning valves to optimize performance.
Moderate – It is recommended to address this issue soon to avoid reduced engine performance.
Driving with a malfunctioning intake system can lead to increased emissions and potential safety issues.
• Engine at operating temperature
• Vehicle in neutral or park
The intake manifold tuning valve is located on the intake manifold, typically on the side opposite cylinder number 1.
Q: Can I drive with a P0665 code?
A: It's possible to drive for a short period, but it's best to fix the issue soon to avoid further engine problems.
Q: Will a P0665 code cause my car to fail emissions testing?
A: Yes, a malfunctioning intake system can increase emissions and cause the vehicle to fail emissions tests.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.