Misfire Detected with Low Fuel
What does P0313 mean?
The P0313 code means the vehicle's onboard diagnostic system has detected: Misfire Detected with Low Fuel. This is a critical severity code.
Common Symptoms
- Engine misfires with low fuel level
- Check Engine Light illuminated
- Engine sputters and hesitates
- Rough idle when fuel is low
- Engine stalls at low fuel levels
Probable Causes (Ranked by Likelihood)
- Fuel level too low -- fuel pump unable to maintain pressure Very High
- Failing fuel pump exposed by low fuel conditions High
- Clogged fuel filter reducing fuel flow at low levels High
- Fuel tank pickup tube or sock filter clogged with debris Moderate
- Faulty fuel level sensor giving incorrect readings Low
Step-by-Step Diagnostic Procedure
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Add fuel to bring the tank above 1/4 full and clear the code -- if it does not return, the issue was simply low fuel
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Monitor fuel pressure with a gauge at idle and under load -- should maintain 40-60 PSI consistently
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Replace the fuel filter if it has not been changed per the maintenance schedule
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If misfires persist with adequate fuel, test the fuel pump pressure and volume output
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Inspect the fuel tank for contamination or debris that may clog the pickup tube
Frequently Asked Questions
Can I drive with code P0313?
Add fuel immediately. If the code clears after refueling and does not return, the issue was simply low fuel. If it persists, have the fuel system inspected as the pump may be failing.
Can running on low fuel damage my engine?
Yes. Running on very low fuel causes the fuel pump to overheat since it is cooled by the surrounding fuel. It can also pick up sediment from the bottom of the tank, clogging the fuel filter and injectors.
How low is too low for fuel?
As a general rule, try to keep your tank above 1/4 full. Running below 1/8 tank regularly stresses the fuel pump and increases the risk of misfires and fuel delivery problems.