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Engine-Codes – Generic – P0313

P0313 Code - Misfire Detected with Low Fuel

Quick Answer

When the diagnostic trouble code P0313 is triggered, it indicates that a misfire has been detected in one of the engine cylinders while the fuel level is low. Common causes include Faulty spark plugs: Worn or fouled spark plugs can lead to incomplete combustion in the cylinder, Ignition coil failure: A malfunctioning ignition coil can cause a weak spark, leading to a misfire, Clogged fuel injectors: Dirty or clogged fuel injectors can disrupt the fuel-air mixture, causing a misfire. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0313 indicates Misfire Detected with Low Fuel.
Common causes
Common causes include Faulty spark plugs: Worn or fouled spark plugs can lead to incomplete combustion in the cylinder, Ignition coil failure: A malfunctioning ignition coil can cause a weak spark, leading to a misfire, Clogged fuel injectors: Dirty or clogged fuel injectors can disrupt the fuel-air mixture, causing a misfire.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0313 Description

When the diagnostic trouble code P0313 is triggered, it indicates that a misfire has been detected in one of the engine cylinders while the fuel level is low. This can have detrimental effects on the vehicle's performance and fuel efficiency. A misfire occurs when there is a lack of combustion in the cylinder, leading to rough idling, reduced power, decreased fuel efficiency, and potential damage to the catalytic converter over time. Low fuel levels can exacerbate the issue by causing the fuel pump to work harder and potentially fail due to inadequate fuel supply.

OBDII Code P0313 - Misfire Detected with Low Fuel
P0313 Code - Misfire Detected with Low Fuel

Common Causes of P0313

  1. Faulty spark plugs: Worn or fouled spark plugs can lead to incomplete combustion in the cylinder.
  2. Ignition coil failure: A malfunctioning ignition coil can cause a weak spark, leading to a misfire.
  3. Clogged fuel injectors: Dirty or clogged fuel injectors can disrupt the fuel-air mixture, causing a misfire.
  4. Low fuel pressure: Inadequate fuel pressure can result in a lean fuel mixture, leading to a misfire.
  5. Vacuum leak: A vacuum leak can introduce excess air into the combustion chamber, affecting the air-fuel ratio and causing a misfire.

Symptoms of P0313

  1. Rough idling: The engine may vibrate or shake while idling, indicating a misfire.
  2. Reduced power: The vehicle may struggle to accelerate or maintain speed due to incomplete combustion in the cylinders.
  3. Poor fuel efficiency: A misfire can lead to wasted fuel, resulting in decreased miles per gallon.
  4. Check Engine Light: The illumination of the Check Engine Light is a common symptom of a misfire being detected by the vehicle's onboard diagnostics system.

How to Fix P0313

  1. Diagnose the issue: Use a diagnostic scanner to identify the specific cylinder experiencing the misfire and inspect related components.
  2. Replace spark plugs: Install new spark plugs to ensure proper ignition in the cylinders.
  3. Check ignition coils: Test the ignition coils for proper functioning and replace any faulty ones.
  4. Clean or replace fuel injectors: Clean clogged fuel injectors or replace them if necessary to maintain proper fuel delivery.
  5. Address fuel system issues: Check fuel pressure, fuel filter, and fuel pump operation to ensure adequate fuel supply to the engine.

Cost to Fix P0313

The cost of repairing a misfire detected with low fuel (P0313) can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the repair cost for this code can range from $100 to $500, including parts and labor. It's important to note that labor rates at auto repair shops can vary significantly, with hourly rates typically ranging from $80 to $150. Factors such as the vehicle's make and model, the location of the repair shop, and the severity of the issue can all impact the final repair cost. It is advisable to consult with a trusted mechanic or repair shop for a more accurate cost estimate based on your specific circumstances.

What does this mean?

Tech Notes for P0313

Even though this code condition states that a misfire condition has occurred at a low fuel level, does not always mean a low fuel level, it could also mean the fuel pressure is not adequate, so a fuel pressure test would be needed.

When is the Code Detected?

Misfire detected with low fuel

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Code P0313 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0313 Code

1. What are the common symptoms of OBDII code P0313 (Misfire Detected with Low Fuel)?

- Common symptoms include rough idle, engine hesitation, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of OBDII code P0313?

- The most common causes are low fuel level, faulty ignition coil, spark plug, fuel injector, or fuel pump.

3. How can I diagnose OBDII code P0313?

- Use an OBDII scanner to read the code and check for misfire data on the affected cylinders. Inspect the fuel system components and ignition system for any issues.

4. Can driving with OBDII code P0313 cause further damage to the vehicle?

- Continuing to drive with this code can potentially damage the catalytic converter due to unburned fuel entering the exhaust system.

5. How should I address OBDII code P0313 (Misfire Detected with Low Fuel)?

- Refill the fuel tank, clear the code, and monitor for any recurrence. If the issue persists, further diagnosis and potential component replacement may be necessary.

6. Are there any DIY repair tips for OBDII code P0313?

- You can start by checking and replacing the spark plugs, ignition coils, and fuel injectors if needed. Ensure proper fuel levels and quality as well.

7. Can bad quality fuel trigger OBDII code P0313?

- Yes, using poor quality or contaminated fuel can contribute to misfires and trigger this code. Always use high-quality fuel from reputable sources.

8. Is it safe to continue driving with OBDII code P0313?

- It is not recommended to drive for an extended period with this code active, as it can lead to more severe engine problems and potential breakdowns.

9. How much does it typically cost to repair OBDII code P0313?

- The cost of repair can vary depending on the exact cause of the misfire. Simple fixes like replacing spark plugs may cost less, while issues with fuel injectors or the fuel pump can be more expensive.

10. Can extreme weather conditions trigger OBDII code P0313?

- Yes, extreme temperatures or weather conditions can sometimes exacerbate existing issues related to the fuel system or ignition components, leading to misfires and triggering this code.

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