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Engine Fault Code P0595

Cruise Control Servo Control Circuit Low

Care Engine Code Reader
The Engine Fault Code P0595 refers to a problem with the cruise control servo control circuit. This code indicates that the cruise control system is not receiving the correct signal or power to function properly. The `Low` part of the code suggests that the voltage in the control circuit is lower than expected.

While this code generally has the same meaning across many manufacturers, there can be some variations depending on the specific vehicle. Here are some alternative meanings or related issues based on different brands:

1. P0595 for Porsche: It may indicate a fault in the cruise control module or wiring issues in the control circuit.

2. P0595 for Audi: Similar to Porsche, it could point to problems with the cruise control module or a malfunction in the throttle control system.

3. P0595 for Mercedes: This code might suggest issues with the electronic throttle control or a fault in the cruise control switch.

4. P0595 for Mini: It may indicate a malfunction in the cruise control actuator or related wiring problems.

5. P0595 for Jaguar: The code might be associated with a failure in the cruise control system or a communication issue between modules.

6. P0595 for Land Rover: Similar to Jaguar, it could indicate problems with the cruise control system or the control circuit itself.

In all cases, it`s essential to check the wiring, connectors, and the cruise control module for any faults. If you encounter this code, its a good idea to use a diagnostic scanner to get more details and potentially clear the code after addressing any underlying issues.
The Engine Fault Code P0595 indicates a problem with the cruise control servo control circuit, specifically that it is reading low voltage. This code can be triggered by several factors, and while the general causes are similar across different manufacturers, there may be variations based on the vehicle`s design. Here are some common causes:

1. Faulty Cruise Control Module: The module that controls the cruise control system may be malfunctioning. This can happen due to internal failures or software issues.

2. Wiring Issues: Damaged, corroded, or frayed wires in the cruise control circuit can lead to low voltage readings. Check the wiring harness for any signs of wear or damage.

3. Poor Ground Connection: A bad ground connection can affect the cruise control servo`s ability to function properly. Ensure that all ground connections are clean and secure.

4. Faulty Brake Switch: The brake switch tells the cruise control system when to disengage. If this switch is faulty or stuck, it may cause the system to read low voltage.

5. Throttle Position Sensor (TPS) Issues: If the TPS is not sending the correct signals, it could affect how the cruise control operates, potentially leading to this fault code.

6. Malfunctioning Accelerator Pedal Position Sensor: Similar to the TPS, if the accelerator pedal position sensor is faulty, it can impact the cruise control system.

7. Software Glitches: Sometimes, the vehicle`s computer may need a software update or reset to clear glitches that cause this code.

8. Fuse Issues: A blown fuse related to the cruise control system can also lead to low voltage readings.

Manufacturer-Specific Notes:
Porsche: Check for specific software updates for the control module, as Porsche vehicles often have updates that can resolve these issues.
Mini: Mini models may have unique wiring layouts; ensure that the wiring diagrams for your specific model year are consulted.
Mercedes-Benz: Mercedes vehicles may have multiple modules involved; a diagnostic scan can help pinpoint the exact issue.
Audi: Audis complex electrical systems may require specialized diagnostic tools to read additional fault codes that could relate to the cruise control.
Jaguar: Jaguars often have integrated systems; ensure that other systems are functioning correctly as they may impact cruise control.
Land Rover: Land Rovers can have unique quirks with their electrical systems; check for recalls or service bulletins related to cruise control.

If you encounter this code, it`s a good idea to start with a thorough inspection of the wiring and connections, and then move on to testing individual components.
The P0595 code indicates a problem with the cruise control servo control circuit, specifically that its reading low voltage. Heres how you can address this issue, keeping in mind that the steps may vary slightly depending on the manufacturer and model of your car.

General Steps to Fix P0595:

1. Check the Fuses:
– Start by checking the fuse related to the cruise control system. A blown fuse can cause low voltage issues.

2. Inspect Wiring and Connectors:
– Look for any damaged or corroded wiring and connectors in the cruise control system. Pay close attention to the servo connections.

3. Test the Cruise Control Servo:
– Use a multimeter to check the voltage at the cruise control servo. If its low, the servo may be faulty and need replacement.

4. Check the Brake Pedal Switch:
– The brake pedal switch can affect the cruise control system. Ensure its functioning properly and not stuck.

5. Scan for Other Codes:
– Use an OBD-II scanner to check for any other related fault codes. These can give you more insight into the problem.

6. Inspect the Accelerator Pedal Position Sensor:
– If this sensor is faulty, it can affect the cruise control operation. Test it for proper function.

7. Control Module Issues:
– If everything else checks out, the problem may lie in the cruise control module itself. You may need to reprogram or replace it.

Manufacturer-Specific Notes:

Porsche:
– Check if the vehicle has a specific cruise control module that may need reprogramming or replacement.

Mini:
– Look for software updates that might fix bugs related to the cruise control system.

Mercedes:
– Mercedes vehicles often have complex electrical systems, so ensure all related systems are functioning properly.

Audi:
– Audi models may have a dedicated diagnostic tool that can provide more detailed information about the cruise control system.

Jaguar:
– Check for recalls or service bulletins related to the cruise control system, as Jaguar sometimes issues fixes for known issues.

Land Rover:
– Similar to Jaguar, check for any known issues or technical service bulletins regarding the cruise control system.

Final Steps:

After performing these checks and repairs, clear the fault code using an OBD-II scanner and take the vehicle for a test drive to see if the issue persists. If the code returns, it may be best to consult a professional mechanic for further diagnosis.
Driving with a P0595 code, which indicates a problem with the cruise control servo control circuit, is generally not safe. Heres a breakdown of what this code means and how it might affect different manufacturers:

General Impact:
1. Cruise Control Malfunction: The primary issue is that your cruise control may not work properly. This can lead to challenges in maintaining speed on the highway.
2. Potential Safety Risks: If the cruise control engages unexpectedly or fails to disengage, it could create a dangerous driving situation.

Manufacturer-Specific Considerations:

1. Porsche:
– Impact: In most Porsches, the cruise control system is integrated with other electronic systems. A malfunction could affect driving comfort and safety.
– Its best to get it checked promptly.

2. Mini:
– Impact: Mini vehicles often have advanced electronic systems. A P0595 code might cause erratic behavior in cruise control.
– Driving without fixing this could be risky; have it diagnosed soon.

3. Mercedes:
– Impact: Mercedes models may have additional safety features linked to cruise control. A malfunction could impact these features.
– Its advisable to address this issue quickly to ensure full functionality.

4. Audi:
– Impact: Audis sophisticated systems mean that a P0595 code could lead to more extensive issues beyond just cruise control.
– Dont delay in getting it checked; it could affect other systems.

5. Jaguar:
– Impact: Jaguars often have integrated systems, and a malfunction could affect overall vehicle performance.
– Its safer to have this resolved to avoid any potential driving issues.

6. Land Rover:
– Impact: Land Rovers have complex electronics, and a cruise control issue could lead to other electronic problems.
– Addressing this code is important for safety and vehicle reliability.


While you might still be able to drive your vehicle with a P0595 code, its not advisable. The cruise control system is an important feature, and its malfunction could lead to unsafe driving conditions. Its best to have the issue diagnosed and repaired as soon as possible, regardless of the vehicle brand.

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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