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Engine Fault Code P0564

Cruise Control Multi-Function Input A Circuit

Care Engine Code Reader
The engine fault code P0564 refers to a problem with the cruise control system, specifically the `Multi-Function Input A Circuit.` This code generally indicates that there is an issue with the signals being sent from the cruise control switch or related components to the engine control module (ECM).

Heres a breakdown of what it means:

1. Cruise Control System: This system allows you to maintain a steady speed without having to keep your foot on the accelerator. It relies on various inputs to function properly.

2. Multi-Function Input A: This usually refers to the signal from the cruise control switch or pedal position sensor that tells the ECM what the driver`s intentions are regarding cruise control.

3. Circuit Issue: The code suggests that there is a problem with the electrical circuit. This could be due to a faulty switch, a wiring issue, or even a problem with the ECM itself.

Possible Causes:
– Faulty cruise control switch
– Damaged wiring or connectors
– Faulty brake pedal switch
– Issues with the ECM

Manufacturer Variations:
While P0564 is a standard OBD-II code, some manufacturers might have specific interpretations or additional codes related to it. Here are a few examples:

Porsche: May refer to specific cruise control components or modules.
Mini: Might indicate issues with the multi-function steering wheel controls.
Mercedes: Could involve additional checks for the brake light switch or other related systems.
Audi: Similar to VW, could involve specific components like the throttle control.
– Jaguar and Land Rover: Might have unique diagnostic procedures due to their complex systems.

Next Steps:
If you encounter this code, its best to:
1. Inspect the cruise control switch and wiring.
2. Check the brake pedal switch.
3. Use a diagnostic scanner to look for additional codes that may provide more context.
4. If unsure, consult a professional mechanic familiar with your specific vehicle brand.

Addressing this issue promptly can help ensure your cruise control system works safely and effectively.
The Engine Fault Code P0564 relates to the cruise control system, specifically indicating an issue with the Multi-Function Input A Circuit. Here are some common causes for this code, which can vary by manufacturer:

1. Faulty Cruise Control Switch: The switch that controls the cruise control may be malfunctioning or stuck.

2. Wiring Issues: Damaged or corroded wiring in the Multi-Function Input A Circuit can lead to poor connections, causing the code.

3. Faulty Brake Pedal Switch: If the brake pedal switch is not working properly, it can send incorrect signals to the cruise control system.

4. Faulty Accelerator Pedal Position Sensor: This sensor tells the engine control unit (ECU) how far the accelerator is pressed. If it`s faulty, it can trigger the code.

5. ECU Issues: In some cases, the Engine Control Unit itself may have a fault or require a software update.

6. Faulty Clutch Pedal Switch: On manual transmission vehicles, if the clutch pedal switch is not functioning, it may affect cruise control operation.

7. Other Sensor Malfunctions: Other related sensors, like the throttle position sensor, may also contribute to this issue.

Manufacturer-Specific Notes:

Porsche: Look for specific issues with the PCM (Powertrain Control Module) or check for compatibility with aftermarket parts.

Mini: Mini vehicles may have unique wiring harness issues that could affect the cruise control circuit.

Mercedes: Mercedes models often have advanced cruise control systems that may require specialized diagnostic tools for accurate troubleshooting.

Audi: Audi vehicles might have more complex electronic systems, so ensuring all software is updated is crucial.

– Jaguar and Land Rover: These brands often have integrated systems, meaning multiple modules could be involved, and a thorough scan of all systems may be necessary.

When diagnosing this code, its essential to use a reliable OBD-II scanner and, if needed, consult the specific service manual for the vehicle to understand the system better.
The Engine Fault Code P0564 refers to an issue with the cruise control multi-function input circuit. This can happen in various European cars, including Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover. Here`s how you can troubleshoot and fix this issue:

General Steps to Fix P0564:
1. Check the Cruise Control Switch:
– Inspect the cruise control switch for any physical damage or wear. If it`s faulty, it may need replacement.

2. Inspect Wiring and Connectors:
– Look for damaged, frayed, or corroded wiring related to the cruise control system. Ensure all connectors are secure and free of dirt or corrosion.

3. Test the Brake Light Switch:
– The brake light switch can affect cruise control operation. Make sure its working properly, as a malfunction can trigger this code.

4. Scan for Other Codes:
– Use an OBD-II scanner to check for additional trouble codes. Sometimes, other codes can provide more context about the issue.

5. Check the Vehicle`s Battery and Ground Connections:
– A weak battery or poor ground connections can cause electrical issues. Ensure the battery is in good condition and all ground connections are tight.

6. Inspect the Engine Control Module (ECM):
– If everything else checks out, the ECM may have a fault. This is less common, but its worth considering if youve exhausted other options.

Manufacturer-Specific Considerations:
Porsche:
– Check for software updates that might address cruise control issues. Sometimes, reprogramming the ECM can help.

Mini:
– Look for specific recalls related to the cruise control system. Some models might have known issues that are covered by the manufacturer.

Mercedes:
– The cruise control stalk can sometimes wear out. If you notice other electrical problems, it could indicate a larger issue with the electrical system.

Audi:
– Audi vehicles often have complex wiring. Use a wiring diagram to trace the cruise control circuit if you suspect wiring issues.

Jaguar:
– For Jaguars, ensure that the software is up to date, as some models can have software glitches affecting the cruise control.

Land Rover:
– Land Rovers may have unique features in their cruise control systems. Consult the owners manual for specific troubleshooting steps.


Fixing the P0564 code involves checking the cruise control switch, wiring, brake light switch, and possibly the ECM. Each manufacturer may have specific quirks, so it`s good to keep those in mind while troubleshooting. If you`re unsure or the problem persists, consider consulting a professional mechanic who specializes in European cars.
Driving with a P0564 code, which indicates a problem with the Cruise Control Multi-Function Input A Circuit, can be concerning. Heres what you should know about it:

General Information:
1. What it Means: The P0564 code typically means there`s an issue with the cruise control system`s input circuit. This could involve the cruise control switch, wiring, or the engine control module (ECM).

2. Safety:
– Immediate Safety: Generally, it is safe to drive your vehicle with this code. However, your cruise control may not work, which could be inconvenient on long drives.
– Long-Term Safety: If other symptoms appear (like warning lights or performance issues), it`s best to get it checked out soon.

Manufacturer Differences:
Porsche: The system may be more integrated with performance features. If you notice any other issues, have it checked quickly.
Mini: Mini vehicles might have unique wiring that could lead to other electrical issues. Monitor for any additional problems.
Mercedes: Mercedes often has advanced cruise control features. If the code appears, ensure no other systems are affected, as they can be interconnected.
Audi: Audis may have more sophisticated electronics. If you experience any erratic behavior, its best to get a professional diagnosis.
Jaguar: Jaguars can have complex systems. If you notice any unusual behavior, its recommended to consult a mechanic.
Land Rover: Given their off-road capabilities, if the cruise system is malfunctioning, it might affect other systems. Keep an eye out for warning lights.


While its generally safe to drive with a P0564 code, its wise to monitor your vehicle for any additional symptoms. If your cruise control is important for your driving style or if you notice other issues, getting it checked by a professional is a good idea.

OBD Codes Explained

Engine Codes

P is for PowerTrain - Engine and Transmission.

P0 Indicates Generic Powertrain Codes

P0 Codes indicate problems with the powertrain and are common for all vehicles using the OBD-II Standard.

P1 Enhanced Manufacturer Specific Codes

P1 Codes are specific to manufacturers.

Sub-System

The 3rd Digit indicates the Sub-System

1 – Emission Management

2 – Injector Circuit

3 – Ignition

4 – Emission Control

5 – Vehicle Speed and Idle

6 – Computer and Output

7 – Transmission

8 – Transmission

9 – Reserved

0 – Reserved

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