P0581 OBD-II Trouble Code: Cruise Control Multi-Function Input "A" Circuit High

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0581 code

P0581 is a diagnostic trouble code (DTC) for "Cruise Control Multi-Function Input "A" Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0581 DIAGNOSTIC Get a fair and transparent estimate upfront

P0581 code definition

The P0581 code indicates that the PCM has detected a malfunction in the electrical components of the cruise control multi-function input circuit.

What the P0581 code means

In order to assist the cruise control module in controlling vehicle speed, the PCM monitors the performance of all cruise control components. If the PCM detects that the cruise control multi-function circuit is providing an abnormal voltage reading (as opposed to the manufacturer’s specifications for the current drive conditions), it will store the P0581 code.

What causes the P0581 code?

In most cases, a faulty cruse control switch is the problem behind the P0581 code. This switch can fail due to shorted or open circuitry, particularly in the cruise control buttons if water, liquid, or dirt has been spilled onto the buttons. Other causes may include:

  • Open, shorted, or otherwise damaged electrical components, such as wiring, connectors, and harnesses
  • Blown fuses, which may indicate a larger issue

What are the symptoms of the P0581 code?

In addition to the illuminated Check Engine lamp, this code is usually accompanied by an inability to use the cruise control. Blown fuses may be a cause or a symptom, depending on the exact nature of the issue causing the P0581 code.

How does a mechanic diagnose the P0581 code?

After verifying the code with an OBD-II scanner, it is important to inspect all electrical components, and perform any repairs that are necessary on the wiring, connectors, or harnesses. Afterwards, clearing the code from the PCM, and performing a retest, will let the technician know if this has resolved the issue. If the code reappears in the PCM, the next step is to replace the cruise control switch. If the code reappears after this repair, the mechanic may need to disconnect the cruise control switch, and manually test the voltage reading to find the source of the problem.

Common mistakes when diagnosing the P0581 code

The most common misdiagnosis with the P0581 code, is replacing components that were or were not faulty, without checking for blown fuses. If a fuse is blown, a replacement part will likely fail again quickly.

How serious is the P0581 code?

While the cruise control may not be usable, but this should not affect any other function of the vehicle; therefore, the P0581 code is only a mild repair issue. However, if a fuse is blown, there may be some other minor electrical issues, such as the inability to use the turn signal, which could cause unsafe driving conditions; in this case, the P0581 code would be considered a more serious repair issue.

What repairs can fix the P0581 code?

There are many ways that a technician can address a P0581 code detection. They include:

  • Replacing a faulty cruise control switch
  • Replacing damaged cruise control buttons to ensure a replacement switch does not become damaged
  • Repairing open, shorted, or otherwise damaged electrical components, such as wiring, connectors, and harnesses
  • Replacing blown fuses

Additional comments for consideration regarding the P0581 code

An unresolved P0581 code that is still stored in the PCM means that the vehicle may not be able to pass an emissions test.

Need help with a P0581 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
trouble codes
P0581

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0581 code.

SCHEDULE P0581 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7294)

Rating Summary
6779
246
57
39
173
6779
246
57
39
173
 at YourMechanic

Simon

30 years of experience
8 reviews
Simon
30 years of experience
Honda Element L4-2.4L - Check Engine Light is on Inspection - Albuquerque, New Mexico
Simon was Professional, knowledgeable and patient throughout the entire process. Would highly recommend!
 at YourMechanic

Luke

17 years of experience
134 reviews
Luke
17 years of experience
Chevrolet Equinox L4-2.4L - Check Engine Light is on - Austin, Texas
Luke was friendly and professional. He did a nice job of explaining the issue with my car so that I could understand it.
 at YourMechanic

Chuy

14 years of experience
386 reviews
Chuy
14 years of experience
Toyota Camry L4-2.5L - Check Engine Light is on - Chicago, Illinois
His explained everything very clearly on what I should do next with my car and what the cheapest solutions were.
 at YourMechanic

Jose

12 years of experience
31 reviews
Jose
12 years of experience
Chrysler Pacifica V6-3.8L - Check Engine Light is on - Redlands, California
Very friendly and punctual. Knows what he is talking about. Appreciate Jose working on my car. I would recommend him to customers.


More related articles

Related questions

Ecu problem wanting to make sure

You need to have some of the codes like the first three diagnosed using the proper pinpoint tests until a problem is found. You may have an electrical harness short or a cut that is causing all the codes. Only...

P0421 and P0401 codes have appeared

Hello. The codes P0421 (https://www.yourmechanic.com/article/p0421-obd-ii-trouble-code-warm-up-catalyst-efficiency-below-threshold-bank-1-by-andrew-quinn) and P0401 (https://www.yourmechanic.com/article/p0401-obd-ii-trouble-code-exhaust-gas-recirculation-flow-malfunction-by-jay-safford) refer to the oxygen sensor (https://www.yourmechanic.com/services/oxygen-sensor-replacement) and EGR valve (https://www.yourmechanic.com/services/exhaust-gas-recirculation-egr-valve-replacement), respectively. It is possible that an issue with one is causing the fault to be seen by the other, as they will...

Check Engine Light is on - 2012 Nissan Xterra

Anytime a code is stored, it will stay stored and the Check Engine Light will stay on until the ECM memory is cleared. If the problem is fixed, then the light and code should not come back. Many times a...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com