P0581 Code: Cruise Control Multi-Function Input “A” Circuit High

The cruise control system was developed to reduce driver fatigue. It lets you maintain a consistent speed, so it’s extremely useful, especially during long trips. If there’s an issue with this feature, the powertrain control module (PCM) might log a P0581 code.

What Does the P0581 Code Mean?

Diagnostic trouble code (DTC) P0581 stands for “Cruise Control Multi-Function Input ‘A’ Circuit High.”

The code is set when the PCM detects a fault in a specific circuit within the cruise control system. P0581 usually points to a problem in the cruise control switch located on your steering column or dashboard. However, it can vary significantly depending on your vehicle’s make and model.

A control module manages your cruise control system. Code P0581 is triggered when the PCM detects a high electrical value within the “A” cruise control multi-function input circuit.

Note: The definition of code P0581 might be different depending on the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0581 Code?

• Multi-function/cruise control switch malfunction
• Wiring or connector issues
• Dirt or grime on the cruise control switch
• PCM issue

What are the Common Symptoms of the P0581 Code?

• Illuminated check engine light
• Illuminated cruise control light regardless of position
• Inoperative cruise control
• Cruise control can’t be set to a specific speed

How to Diagnose the P0581 Code

DTC P0581 can be logged on various makes and models. However, this doesn’t mean that there is a universal procedure for diagnosing and repairing this trouble code.

If you’re not familiar with the cruise control system, it might be best to have a mechanic diagnose the problem. But if you’re an experienced automotive DIYer, then you can go ahead and do the job yourself. The video below will give you an idea of what the diagnostic process might involve:

How to Fix the P0581 Code

Fixing the P0581 code can be complicated. So if you’re not an experienced automotive DIYer with in-depth knowledge about the cruise control system, we recommend taking a trip to an auto repair shop to resolve this DTC.

However, if you have the tools and technical know-how to get the job done, you can try and fix the problem yourself. Guides like the ones from Chilton can help you with your repair. You can also get an ALLDATA subscription for vehicle-specific repair steps.

Where to Get a New Cruise Control Switch to Fix DTC P0581

Failing to address code P0581 can lead to several complications, so it’s best to pinpoint what triggered it immediately. If it’s a bad cruise control switch, don’t put off replacing it with a new one from CarParts.com.

Every cruise control switch in our catalog is vetted by industry professionals to guarantee both quality and longevity. That means you won’t have to worry about your new cruise control switch malfunctioning anytime soon.

On top of that, you don’t have to wait long for your new cruise control switch. All our products are on hand at our warehouses, which are strategically located all over the US to ensure fast shipping. On top of that, you won’t have to worry about breaking the bank because our switches come at competitive prices.

To get started, use your mobile device or computer to visit our website. Check out compatible parts that fit your ride and match your needs using the vehicle selector and search filters.

Clear DTC P0581 as soon as possible. Order a replacement cruise control switch today!