GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2005 🢒 L300/LW300 🢒 Brakes 🢒 Park Brake 🢒 DTC P0313

Circuit Description

If the fuel level is low and the engine control module (ECM) detects a lean or misfire condition, DTC P0313 will set.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0313 Misfire Detected with Low Fuel Level

Conditions for Running the DTC

DTCs P0171, P0174, P0300, or P0301-P0306 are not set.

Conditions for Setting the DTC
    • The ECM detects an excessively lean condition or an excessive misfire.
    • The fuel level signal is less than 5.6 liters (1.4 gallons).
    • The above condition is met for longer than 10 seconds.

Action Taken When the DTC Sets
    • The control module stores the DTC information into memory when the diagnostic runs and fails.
    • The malfunction indicator lamp (MIL) will not illuminate.
    • The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
    • The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC
    • A current DTC Last Test Failed clears when the diagnostic runs and passes.
    • A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
    • Clear the DTC with a scan tool.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Important: Verify there is an adequate fuel supply in the tank. Add fuel if necessary.

  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC run and pass?

System OK

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information