P0313: Misfire Detected with Low Fuel
P0313 indicates that the engine control module (ECM) has detected a misfire condition while the fuel level is low. This code is often triggered when the fuel tank is nearly empty, causing the fuel pump to draw in air or insufficient fuel pressure, leading to lean misfires. However, it can also point to underlying issues such as a failing fuel pump, clogged fuel filter, or faulty fuel pressure regulator. The misfire may be intermittent and more noticeable during low fuel conditions.
01. Most Common Causes
- Low fuel level (below 1/4 tank)
- Failing fuel pump
- Clogged fuel filter
- Faulty fuel pressure regulator
- Contaminated fuel
02. Symptoms You Will Notice
- Engine misfire or hesitation
- Rough idle
- Check Engine Light on
- Poor fuel economy
- Engine stalling
03. Step-by-Step Diagnosis
Step 1: Check fuel level; fill tank if low and clear codes to see if they return.
Step 2: Inspect fuel pump operation and fuel pressure with a gauge.
Step 3: Replace fuel filter if clogged.
Step 4: Test fuel pressure regulator for proper operation.
Step 5: Check for contaminated fuel or water in the tank.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P0313, as low fuel can cause the engine to stall unexpectedly, leading to a safety hazard. Additionally, continued misfires can damage the catalytic converter.
How much does it cost to fix?▼
The cost varies depending on the root cause. If it's simply low fuel, the cost is just the price of gas. For a fuel pump replacement, expect $400-$800. A fuel filter replacement is typically $50-$150.