Fault Code Spn 1590 Fmi 19 : Expert Solutions for Resolving Issues

The fault code SPN 1590 FMI 19 indicates a cruise control switch signal issue. This fault is related to the electronic system of the vehicle.

When diagnosing this fault code, it is essential to check the wiring connections, cruise control switch, and the ECM for any faults. It is crucial to address this issue promptly to avoid any potential safety risks on the road. We will discuss the causes of SPN 1590 FMI 19 fault code, potential solutions, and steps to resolve this issue effectively.

Understanding Fault Codes

What Are Fault Codes?

Fault codes are numerical codes that indicate issues within a vehicle’s system.

Fault Code Spn 1590 Fmi 19

Why Are Fault Codes Important?

Fault codes help pinpoint problems quickly, aiding in efficient diagnostics and repairs.

Fault Code Spn 1590 Fmi 19  : Expert Solutions for Resolving Issues

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Overview Of Fault Code Spn 1590 Fmi 19

Fault Code SPN 1590 FMI 19 is a diagnostic trouble code that can occur in vehicle systems, indicating a specific issue that needs attention. Understanding each component of this fault code is crucial for effective troubleshooting and resolving the underlying problem.

Explanation Of Spn 1590

SPN stands for Suspect Parameter Number, which is a unique code assigned to specific engine or system components for diagnostic purposes. In the case of SPN 1590, it usually points towards issues related to the engine speed/timing sensor. Detection and interpretation of SPN codes are essential for identifying the exact nature of the problem.

Explanation Of Fmi 19

FMI, or Failure Mode Identifier, specifies the type of failure associated with a particular SPN code. When FMI 19 is triggered along with SPN 1590, it often indicates that the engine speed/timing sensor has detected an abnormal frequency, potentially leading to performance issues or malfunctions within the engine system.

Common Causes Of Fault Code Spn 1590 Fmi 19

When it comes to diagnosing a fault code SPN 1590 FMI 19, it is essential to identify the common causes that may trigger this issue. By understanding these causes, you can take the necessary steps to rectify the problem efficiently. Below are some of the most frequent culprits behind fault code SPN 1590 FMI 19:

Poor Electrical Connection

A poor electrical connection is a prominent cause of fault code SPN 1590 FMI 19. This occurs when the wires connecting various components related to the fault code are loose, damaged, or improperly connected. When the electrical connection is compromised, the signals sent by the sensors may become distorted or interrupted, resulting in the fault code.

Faulty Sensor

In some cases, a faulty sensor can trigger fault code SPN 1590 FMI 19. Sensors play a crucial role in monitoring various parameters and sending signals to the engine control unit. If a sensor malfunctions or fails to operate accurately, it may provide incorrect data or no data at all. As a result, the engine control unit may interpret this as an error and generate the fault code SPN 1590 FMI 19.

Engine Performance Issues

Engine performance problems can also lead to the occurrence of fault code SPN 1590 FMI 19. Issues such as fuel delivery problems, air intake issues, or problems with the exhaust system can affect the engine’s overall performance. When the engine fails to perform optimally, it may trigger the fault code SPN 1590 FMI 19 as a means of alerting the system operator about the underlying issue.

Fault Code Spn 1590 Fmi 19  : Expert Solutions for Resolving Issues

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Diagnostic Steps To Resolve Fault Code Spn 1590 Fmi 19

If you’ve encountered Fault Code Spn 1590 Fmi 19 in your vehicle, it’s crucial to address the issue promptly to prevent potential damage and ensure optimal performance. Here are the diagnostic steps to resolve this fault code:

Checking Electrical Connections

Start by checking all electrical connections related to the sensor affected by the fault code. Ensure that the connections are secure and free from corrosion or damage. Use a multimeter to test for continuity and proper voltage levels across the connections.

Testing The Sensor

Next, perform a thorough test on the sensor associated with the fault code. Check for any physical damage or debris that could be affecting its functionality. Use appropriate diagnostic tools to measure the sensor’s output and compare it to the expected values specified by the manufacturer.

Inspecting Engine Components

Inspect all relevant engine components, including the fuel system, intake manifold, and exhaust system, to identify any potential issues contributing to the fault code. Look for signs of leaks, blockages, or malfunctions that could impact the sensor’s readings and trigger the fault code.

Expert Tips For Troubleshooting Fault Code Spn 1590 Fmi 19

Expert Tips for Troubleshooting Fault Code Spn 1590 Fmi 19

Resetting The Fault Code

To reset the fault code Spn 1590 Fmi 19, follow these steps:

  1. Locate the diagnostic port under the dashboard.
  2. Plug in the diagnostic tool and power it on.
  3. Select the option to clear fault codes.
  4. Wait for the tool to reset the fault code.
  5. Start the vehicle to see if the fault code has cleared.

Updating Software/firmware

Updating the software or firmware of your vehicle’s control modules can help resolve fault code Spn 1590 Fmi 19. Here’s what you can do:

  1. Contact the vehicle manufacturer to obtain the latest software or firmware updates.
  2. Connect the diagnostic tool to the vehicle and download the updates.
  3. Follow the instructions provided to install the updates on the control modules.
  4. After the update is complete, clear the fault code and check if it reoccurs.

Seeking Professional Help

If the fault code Spn 1590 Fmi 19 persists, it is advisable to seek professional help. Qualified technicians can perform advanced diagnostics and repairs to resolve the issue. Additionally, professional assistance ensures that the fault code is accurately diagnosed and rectified, preventing further complications.

Fault Code Spn 1590 Fmi 19  : Expert Solutions for Resolving Issues

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Preventive Measures To Avoid Fault Code Spn 1590 Fmi 19

Preventing the occurrence of fault code SPN 1590 FMI 19 is crucial to maintain the performance and efficiency of your engine. By implementing these preventive measures, you can reduce the likelihood of encountering this fault code and ensure a smoother operation of your vehicle.

Regular Maintenance

Carrying out regular maintenance is the key to preventing fault code SPN 1590 FMI 19. By following a scheduled maintenance routine, you can identify and address any potential issues before they escalate into major problems. Regular maintenance includes:

  • Checking and replacing faulty sensors
  • Inspecting and cleaning electrical connectors
  • Examining and tightening loose connections
  • Performing software updates as recommended by the manufacturer

Using Quality Fuel And Oil

Using high-quality fuel and oil is essential to prevent fault code SPN 1590 FMI 19 from occurring. Inferior fuel or contaminated oil can lead to engine malfunctions and trigger this fault code. To avoid this, make sure to:

  • Use fuel from reputed and trusted sources
  • Check for any signs of impurities in the fuel before refueling
  • Regularly change the oil and oil filter using recommended products
  • Follow the manufacturer’s guidelines for oil viscosity and quality

Keeping The Engine Clean

Maintaining a clean engine is vital in preventing fault code SPN 1590 FMI 19. Dust, debris, and dirt can accumulate over time and affect the performance of your engine. To keep your engine clean:

  • Regularly inspect and clean the air filters
  • Use high-quality fuel additives to clean the injectors and fuel system
  • Ensure the engine compartment is free from any foreign objects or debris
  • Inspect and clean the EGR valve and intake manifold periodically


By following these preventive measures, you can minimize the risk of encountering fault code SPN 1590 FMI 19. Remember, prevention is always better than facing unexpected issues that can disrupt the performance of your engine. Regular maintenance, using quality fuel and oil, and keeping the engine clean are simple steps that can go a long way in ensuring a trouble-free driving experience.

Frequently Asked Questions On Fault Code Spn 1590 Fmi 19

What Does Fault Code Spn 1590 Fmi 19 Indicate?

The fault code Spn 1590 Fmi 19 indicates an engine fuel pump control module failure, leading to reduced engine performance. It may cause issues with starting the engine or loss of power while driving. Immediate diagnostic attention is recommended to prevent further damage to the vehicle.

How Can I Troubleshoot Fault Code Spn 1590 Fmi 19?

To troubleshoot fault code Spn 1590 Fmi 19, start by checking the fuel pump control module for any visible damage or loose connections. Next, conduct a diagnostic scan to identify specific issues. It’s crucial to consult with a qualified technician for a thorough analysis and proper resolution of the fault code.

Is It Safe To Continue Driving With Fault Code Spn 1590 Fmi 19?

It is not advisable to continue driving with fault code Spn 1590 Fmi 19, as it may lead to potential engine performance issues and safety hazards. Immediate attention from a certified mechanic is essential to address the root cause and ensure the safe operation of your vehicle.

What Are The Common Causes Of Fault Code Spn 1590 Fmi 19?

Common causes of fault code Spn 1590 Fmi 19 include wiring harness issues, defective fuel pump control module, or electrical faults. Factors such as moisture ingress or vibration damage can also contribute to this fault code. Thorough diagnostic assessment is necessary to pinpoint the exact cause and address it effectively.


To troubleshoot the Spn 1590 Fmi 19 fault code, it is essential to understand its implications and potential causes. By analyzing the symptoms and consulting professional diagnostic tools, you can efficiently address the issue and prevent further damage. Implementing regular maintenance and following recommended practices will help keep your vehicle in optimal condition, ensuring smooth and uninterrupted operation.

Stay proactive and informed to ensure a hassle-free driving experience.