Code 79 On Holden Cruze: Meaning and How to Reset

Have you ever seen code 79 on your Holden Cruze dashboard? If so, you’re not alone. Code 79 is a common issue that Holden Cruze owners face.

Code 79 on Holden Cruze refers to an error related to the fuel injection system. It can be reset using an OBD-II scanner after diagnosing and repairing the underlying cause.

In this article, we’ll dive into the details of Code 79 and provide step-by-step instructions on resetting it. We’ll also discuss the possible causes of Code 79, how to prevent it from occurring, and the importance of proper maintenance. So, let’s get started and demystify this error code once and for all.

What Does “Code 79” Refer to, and Why is it Important?

In the Holden Cruze, “Code 79” refers to a fault in the engine’s fuel injection system. This error code typically appears when the Engine Control Module (ECM) detects a problem with the fuel injector circuit, which causes the vehicle to run poorly or not start.

It’s important to address Code 79 promptly because it leads to more serious engine problems if unresolved. Ignoring this error code reduces fuel efficiency, engine misfires, and ultimately, engine damage that may require costly repairs. Resetting Code 79 can help you avoid these issues and ensure your Holden Cruze runs smoothly.

What Triggers Code 79 On Holden Cruze?

Error code 79 in Holden Cruze is typically triggered when the engine control module (ECM) detects a problem with the fuel injection system. Some common causes of code 79 are discussed below:

  • Faulty Fuel Injectors: A faulty fuel injector causes a misfire or an uneven fuel delivery, which triggers code 79.
  • Clogged Fuel Filter:  Clogged fuel filters restrict fuel flow to the engine, causing a lean fuel mixture that provokes code 79.
  • Malfunctioning Fuel Pressure Regulator: The fuel pressure regulator maintains constant fuel pressure in the fuel system. A malfunctioning regulator causes the fuel pressure to drop, leading to code 79.
  • Damaged Fuel Lines: Damaged fuel lines result in a leak, reducing fuel pressure and giving rise to code 79.
  • Failed Fuel Pump: A failed fuel pump leads to low or no fuel pressure, which provokes code 79.
  • Wiring Issues: Faulty or damaged wiring in the fuel injection system causes signal disruptions or voltage drops, leading to code 79.
  • Malfunctioning Engine Control Module (Ecm): A malfunctioning ECM fails to detect or respond to issues in the fuel injection system, causing code 79 to be triggered.

What are the Consequences of Ignoring Code 79?

Ignoring code 79 in your Holden Cruze can lead to several consequences that will affect the performance and efficiency of your vehicle, as well as cause damage to the fuel injection system. Now we will bring light to some of the consequences:

  • Reduced Engine Performance: When the fuel injector circuit is interrupted, the fuel supply is affected, causing reduced engine performance. The engine runs poorly, hesitates, and faces difficulty in accelerating.
  • Engine Misfires: The interruption in the fuel injector circuit makes the engine misfire, which leads to rough idling, reduced power, and increased emissions.
  • Poor Fuel Economy: When the engine is not running efficiently, fuel economy suffers. This means the vehicle uses more fuel than usual, which is costly in the long run.
  • Engine Damage: If code 79 is ignored, it leads to more severe engine problems over time. For example, if the fuel injector is not working correctly, it causes damage to the engine’s internal components, such as the pistons and cylinders.
  • Safety Issues: Sometimes, ignoring code 79 lead to safety issues. For example, if the engine stalls while driving, the driver loses control of the vehicle, which is dangerous.

How to Reset Error Code 79 in Holden Cruze

Resetting error code 79 in your Holden Cruze can be a simple process following a step-by-step guide outlining the proper procedures to reset the code using an OBD-II scanner. Here is a step-by-step guide on resetting error code 79 in Holden Cruze using an OBD-II scanner:

  1. Purchase or borrow an OBD-II scanner. You can find one online or at your local auto parts store.
  2. Locate the OBD-II port in your Holden Cruze. The OBD-II port is usually located under the vehicle’s driver’s dashboard.
  3. Turn on the ignition but do not start the engine. This will provide power to the ECM and OBD-II port.
  4. Connect the OBD-II scanner to the OBD-II port. Make sure the scanner is securely connected.
  5. Turn on the OBD-II scanner and select the option to read error codes. Wait for the scanner to communicate with the ECM and display any error codes.
  6. Look for code 79 in the list of error codes. If code 79 is present, proceed to the next step. If not, there may be another issue with the vehicle that needs to be addressed.
  7. Select the option to clear or reset the error codes. The scanner may ask you to confirm your action.
  8. Wait for the scanner to clear the error codes. This may take a few seconds.
  9. Turn off the ignition and disconnect the OBD-II scanner from the OBD-II port.
  10. Wait for a few minutes before turning on the engine. This will allow the ECM to recalibrate.

How Can You PreventError Code 79?

Preventing error code 79 in your Holden Cruze can be achieved by following simple tips that help maintain the fuel injection system and ensure the smooth operation of your vehicle. Here are some tips for preventing error code 79 in your Holden Cruze:

  • Regular Maintenance: Follow the manufacturer’s recommended maintenance schedule for your vehicle, including routine inspections of the fuel injection system. Regular maintenance prevents fuel injection system issues that lead to code 79.
  • Use High-Quality Fuel: Always use high-quality fuel and make sure the fuel tank is clean to prevent contamination of the fuel system. Contaminated fuel causes issues with the fuel injection system, driving to code 79.
  • Replace Fuel Filters: Replace fuel filters at the recommended intervals to prevent a clogged fuel filter from causing code 79.
  • Check Fuel Pressure: Regularly check the fuel pressure to ensure the fuel system works correctly. A drop in fuel pressure triggers code 79.
  • Keep The Vehicle’s Electrical System In Good Condition: Faulty or damaged wiring origins signal disruptions or voltage drops in the fuel injection system, leading to code 79.
  • Address Issues Promptly: If you notice any issues with your vehicle’s performance, such as misfires or reduced power, address them promptly to prevent further damage to the fuel injection system.

What are the Common Mistakes People Make When Resetting Code 79?

When resetting code 79 in your Holden Cruze, it’s important to avoid common mistakes that can lead to further issues or fail to address the underlying cause. Here are some tips on how to avoid these mistakes and ensure a proper reset of the error code:

  • Clearing The Code Without Addressing The Underlying Cause: Resetting the error code without diagnosing and repairing the underlying cause will only clear the symptom of the problem and not the root cause. It is important to diagnose and repair the root cause to prevent the recurrence of code 79.
  • Disconnecting The Battery Instead Of Using An Obd-Ii Scanner: Disconnecting the battery to reset the code seems like an easy and quick fix. However, it causes issues with the vehicle’s electrical system and may not reset the code.
  • Clearing All Codes Without Identifying The Specific Code: Clearing all codes from the ECM without identifying the specific code may clear important diagnostic information that could help identify the underlying cause of the problem.
  • Failing To Verify The Repair: After repairing the underlying cause, failing to verify the repair by monitoring the vehicle’s performance and checking for any recurring codes leads to continuing the issue.

Final Words

Error code 79 in Holden Cruze is caused by various issues related to the fuel injection system. It is important to diagnose and repair the underlying cause to prevent the recurrence of the error code. Resetting the code using an OBD-II scanner can be done by following the step-by-step guide outlined earlier in this article. Still, it is important to remember that resetting the code without addressing the underlying cause may not fix the problem.

By properly maintaining your vehicle and addressing any issues promptly, you can ensure the smooth and efficient operation of your Holden Cruze.