Nissan P1564: ASCD Switch Tips and Fixes

If you’re a proud owner of a Nissan vehicle, you’ve probably come across the term “P1564” at some point. This code refers to an issue with the ASCD (Automatic Speed Control Device) switch, a crucial component that can affect your driving experience. In this comprehensive guide, we will delve into the details of the Nissan P1564 error code, understand its implications, and provide you with some valuable tips and fixes to get you back on the road smoothly.

Understanding the ASCD Switch

To comprehend the P1564 error code, we must first understand the ASCD switch’s role in your Nissan vehicle. The ASCD switch is responsible for maintaining a consistent speed while driving, making it an integral part of your car’s cruise control system. When this switch encounters a problem, it can disrupt your vehicle’s performance and overall driving experience.

Common Symptoms of a Faulty ASCD Switch

Before we delve into the solutions, let’s identify some common symptoms that may indicate a problem with the ASCD switch:

  1. Inoperative Cruise Control: The most apparent sign of a malfunctioning ASCD switch is the inability to engage your car’s cruise control feature.
  2. Illuminated Check Engine Light: A P1564 error code typically triggers the check engine light, signaling an issue that needs attention.
  3. Inconsistent Speed Control: Your vehicle may struggle to maintain a steady speed, leading to fluctuations in your driving experience.

Diagnosing the P1564 Error

Now that we’re familiar with the symptoms let’s move on to diagnosing the P1564 error accurately. To do this, you’ll need an OBD-II scanner, which can read error codes from your vehicle’s computer system.

Steps to Diagnose P1564:

  1. Connect the OBD-II Scanner: Plug the scanner into the OBD-II port, usually located under the dashboard.
  2. Turn on the Ignition: Start your vehicle and turn the key to the “On” position without starting the engine.
  3. Scan for Error Codes: Use the scanner to read error codes stored in the system.
  4. Identify P1564: Look for the specific code P1564, which will confirm the ASCD switch issue.

Fixing the ASCD Switch Issue

Now that you’ve identified the problem, it’s time to explore some fixes for the P1564 error code.

1. ASCD Switch Replacement

In many cases, a faulty ASCD switch may need to be replaced. This is a job best left to a certified mechanic who can safely remove the old switch and install a new one. Ensure you use genuine Nissan parts for optimal performance.

2. Wiring Inspection

Sometimes, the issue may be related to damaged wiring leading to the ASCD switch. A thorough inspection of the wiring harness can reveal any exposed or broken wires that require repair or replacement.

3. Throttle Body Cleaning

An accumulation of dirt and grime on the throttle body can also trigger the P1564 error code. Regularly cleaning the throttle body can prevent this issue and improve overall engine performance.


Dealing with the Nissan P1564 error code can be frustrating, but with the right knowledge and actions, you can resolve the issue and enjoy a smooth driving experience once again. Whether it’s replacing the ASCD switch, inspecting the wiring, or cleaning the throttle body, addressing the problem promptly is essential for your vehicle’s well-being.

FAQs (Frequently Asked Questions)

  1. What does the P1564 error code mean? The P1564 error code in a Nissan vehicle indicates an issue with the ASCD switch, which is responsible for cruise control and speed maintenance.
  2. Can I fix the P1564 error code myself? While some fixes like cleaning the throttle body can be done by DIY enthusiasts, it’s recommended to consult a certified mechanic for proper diagnosis and repair.
  3. Are there any DIY methods to troubleshoot the ASCD switch issue? You can perform a basic check of the wiring harness and connectors to ensure there are no visible issues. However, for a comprehensive diagnosis, professional assistance is advised.
  4. Is it safe to drive with the P1564 error code illuminated? It’s best not to drive with the check engine light on, as it indicates an issue that can affect your vehicle’s performance. Have it checked and repaired as soon as possible.
  5. Where can I get genuine Nissan ASCD switch replacement parts? Genuine Nissan parts can be obtained from authorized dealerships or reputable online retailers specializing in auto parts.

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