P0313 Fault Code

Misfire Detected with Low Fuel

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0313 fault code indicates that the engine computer has detected a misfire condition while the fuel level is low. This can lead to poor engine performance and increased emissions. Understanding the cause and addressing it can help prevent further engine issues.

What are the symptoms of the P0313 code?

Drivers may experience the following symptoms when the P0313 code is present:

• Engine Hesitation: Noticeable delays in acceleration or response when pressing the gas pedal.
• Rough Idle: The engine may run unevenly or shake when idling.
• Decreased Fuel Efficiency: You may notice a drop in miles per gallon.
• Check Engine Light: The onboard diagnostics system will likely trigger a check engine light.

What causes the P0313 code?

Several factors can trigger the P0313 code, including:

• Low Fuel Level: Insufficient fuel may cause the fuel pump to draw in air, leading to misfires.
• Faulty Fuel Pump: A failing pump may not deliver adequate pressure to the engine, resulting in misfires.
• Clogged Fuel Filter: Restrictions in fuel flow can provoke engine misfire conditions during low fuel scenarios.
• Ignition System Problems: Issues with spark plugs, coils, or wiring that affect combustion can result in a misfire code being triggered when fuel is low.

How to fix P0313?

To resolve P0313 code issues, consider the following steps:

• Refuel: Add fuel to ensure that the tank is not running low.
• Inspect and Replace: Examine the fuel system for any faults, including the pump and filter, and replace any defective components.
• Check Ignition Components: Diagnose the ignition system, replacing spark plugs, wires, or coils as necessary.
• Run Diagnostics: Utilize an OBD-II scanner to check for any other fault codes that might provide additional context for the misfire.