P0075 Code: Intake Valve Control Circuit (Bank 1)

The P0075 code is a trouble code that warns the user of a potential issue with the vehicle’s intake valve control solenoid or its circuit. Find out what causes this code to set and how the issue should be addressed with this short guide.

What does the P0075 Code Mean?

Diagnostic trouble code (DTC) P0075 stands for “Intake Valve Control Circuit (Bank 1).” This code sets when the vehicle’s powertrain control module (PCM) determines that the voltage signal from the intake valve control solenoid circuit falls out of the specified range. In other words, if the circuit is open or shorted, the ECM/PCM sets P0075.

The “Bank 1” in this code’s definition refers to the side of the engine that contains cylinder #1. Meanwhile, the intake valve control solenoid is mounted on the intake manifold side of the cylinder head.

Many modern vehicles are equipped with a Variable Valve Timing (VVT) system, which allows the vehicle’s computer to control when the intake and/or exhaust valves open. This system allows the vehicle to have better engine performance and fuel economy.

An important component of the VVT system is the variable valve timing solenoid. In vehicles equipped with VVT, the PCM controls the camshaft position by regulating the amount of engine oil going through the control solenoid.

The PCM uses a pulse width modulated signal (PWM) to monitor and command the control solenoid. In turn, the solenoid regulates oil flow to an actuator mounted on the end of the camshaft. Applying oil pressure to the actuator changes the position of the camshaft, thereby altering valve timing. Code P0075 is set when the PCM perceives a problem with the solenoid that applies oil pressure to the intake camshaft actuator.

The P0075 code is similar to P0076 and P0077. In some cases, P0075 may set along with the P0026 code.

You can learn more about variable valve timing systems in our technical discussion about VVT and camshaft angle.

Note: The definition of code P0075 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P0075 Code?

Diagnostic trouble codes indicate the source and nature of a problem, but they can’t point to the exact root cause. As with most trouble codes, the P0075 code has a handful of possible causes. Below is a list of the most common causes of P0075:

• Faulty control solenoid
• Wiring issues, such as:
  • Wire harness poor connection or corroded terminals
  • Short to power
  • Short to ground
• Engine oil level is too low
• Engine oil does not meet the manufacturer’s requirements
• Faulty PCM (rare)

What are the Common Symptoms of the P0075 Code?

When the vehicle’s computer determines that the signal from a certain sensor or output device does not correlate with the expected value, it stores the error as a diagnostic trouble code. The computer also sends a signal to turn the appropriate indicator light on.

For some codes, an illuminated check engine light may be the only sign that there is an issue with one of the vehicle’s systems. For the P0075 code, however, there are a couple of symptoms that you may notice as well. Listed below are some of the common symptoms of P0075:

• Check engine light or malfunction indicator lamp (MIL) on
• Poor acceleration/decreased engine performance
• Decreased fuel economy/increased fuel consumption
• Rattling noise from the engine 

How to Diagnose the P0075 Code

Determining the root cause behind the P0075 code is important yet challenging. Because DTCs can only indicate the nature of the problem and not its root cause, it’s up to the vehicle’s user or a certified mechanic to properly diagnose the issue. If the root cause is properly identified, this ensures that a long-term solution can be achieved. The challenge lies in the fact that P0075, along with other DTCs, has multiple possible causes. 

Understanding and addressing the P0075 code is less challenging if you have the right resources. Repair manuals and databases are the perfect tools to help you understand trouble codes like the P0075 and how the troubleshooting process goes. They also have repair instructions, diagrams, and illustrations that are easy to understand. 

How to Fix the P0075 Code

The fact that there are a lot of possible reasons why a DTC, such as P0075, sets is not the only challenge you’ll have to face when fixing a trouble code. Remember that vehicles are made differently: their parts, components, general layout, and orientation differ depending on the manufacturer. As such, there is no single way to diagnose and fix a trouble code. The repair instructions for P0075 on Nissan Altimas might not be effective in fixing P0075 on Nissan Sentras.

While repair manuals and databases are helpful to the experienced DIYer, not everyone has the needed amount of technical knowledge and experience to fix trouble codes. If you’re not sure how P0075 repairs should go, it’s better and safer to let a certified mechanic or technician do the job.

Other Notes About P0075

Changing the motor oil and/or filter is a common solution to the P0075 trouble code. However, this does not apply to all cases. When in doubt, consult a repair manual or have the issue fixed by a certified professional.

Where to Get a New Control Solenoid for Your Car

Resolving the P0075 code is usually just a matter of replacing the faulty part that triggered it. For example, if you need to replace some faulty control solenoids, shop online here at CarParts.com.

Fill out our vehicle selector to narrow your search to solenoids that fit your ride, then use the search filters to personalize the results to your needs. Our selection of control solenoids includes accurate and detailed fitment information, so you’re sure to get exactly what your car needs to get back on the road.

We also made sure our catalog includes products that meet industry standards and specifications. They’ve passed numerous quality checks, so you’re sure to get high-quality parts and accessories.

Our 24/7 customer service is also ready to assist you if you have any questions. Also, thanks to our strategically located warehouses across the country, you can expect your order to arrive at your doorstep in as fast as two business days. Check out our selection of control solenoids and enjoy the best deals today!

Products Mentioned in this Guide

Intake Manifold Variable Timing Solenoid Camshaft