P0313
Fix within a few daysEngine Misfire Detected with Low Fuel
Code P0313 means your engine detected misfires when the fuel level was low. Common causes: Weak fuel pump (50%), contaminated fuel (20%), faulty injectors (15%). Drivability: Yes, for short trips, but fix quickly. Repair cost: $50-$400 DIY, $150-$1000 professional.
Can I Drive With P0313?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration. Get it fixed within a few days.
Stop driving immediately if: Flashing Check Engine Light, loud engine noises, burning smell, significant power loss, or engine stalling.
Symptoms of P0313
- 1Check Engine Light is on (may flash during severe misfires)
- 2Engine runs rough or idles poorly
- 3Engine hesitates or lacks power
- 4Reduced fuel economy
- 5Engine may stall, especially at low speeds or when stopping
Common Causes of P0313
Parts most likely causing this code, ranked by probability
A weak fuel pump, clogged fuel filter, or faulty fuel pressure regulator struggles to maintain adequate fuel pressure, especially when the fuel tank is low, leading to misfires.
50% of P0313 cases are fixed by addressing fuel delivery issues
Water or debris in the fuel tank is more likely to be drawn into the fuel system when the fuel level is low, causing misfires.
20% of P0313 cases are fixed by draining contaminated fuel and refilling
Clogged or faulty fuel injectors can cause an improper fuel spray pattern or insufficient fuel delivery, leading to misfires, which can be exacerbated by low fuel conditions.
15% of P0313 cases are fixed by replacing or cleaning fuel injectors
Worn spark plugs, failing ignition coils, or damaged spark plug wires can cause a weak spark, leading to misfires that become more apparent under stressed fuel conditions.
10% of P0313 cases are fixed by replacing ignition components
An unmetered air leak into the engine creates a lean condition, which can cause misfires, and the low fuel condition might be when the engine's computer registers the issue.
5% of P0313 cases are fixed by repairing vacuum leaks
Check These First (Before Buying Parts)
- Fill your fuel tank completely with fresh, quality fuel.
- Visually inspect for any obvious fuel leaks or damaged fuel lines.
- Check for loose or corroded electrical connections at the fuel pump or injectors.
How to Diagnose P0313
- 11. Fill your fuel tank completely and clear the code. Drive the vehicle to see if the code returns.
- 22. Check fuel pressure at the fuel rail using a fuel pressure gauge. Compare readings to manufacturer specifications.
- 33. Inspect spark plugs for wear, fouling, or damage. Check ignition coils for cracks or signs of arcing.
- 44. Test fuel injectors for proper spray pattern and flow rate. Consider cleaning them if they are dirty.
- 55. Perform a smoke test or visually inspect vacuum lines and intake manifold gaskets for leaks.
P0313 on Popular Vehicles
Toyota Camry
2007-2024Camrys with P0313 often have issues with the in-tank fuel pump or a clogged fuel filter, especially on higher mileage vehicles. Check fuel pressure carefully.
60% fixed by fuel system component replacement
Honda Accord
2003-2024For Honda Accords, P0313 can be linked to a weak fuel pump or dirty fuel injectors. It's also worth checking for vacuum leaks around the intake manifold.
55% fixed by fuel system or vacuum leak repair
Ford F-150
2004-2024Ford F-150s frequently experience P0313 due to a failing fuel pump or a clogged fuel filter. The fuel pump driver module (FPDM) located under the truck bed can also corrode and cause intermittent fuel delivery issues.
65% fixed by fuel pump or FPDM replacement
Frequently Asked Questions
What does P0313 mean?
P0313 indicates that your vehicle's engine control module (ECM) has detected misfires occurring specifically when the fuel level in the tank is low.
Can I drive with P0313?
Yes, for short trips only. You can drive your vehicle to a repair shop or parts store, but limit driving. Continued driving with misfires, especially if the Check Engine Light is flashing, can cause severe damage to your catalytic converter.
Will P0313 clear itself?
No, P0313 will not clear itself. While filling the fuel tank might temporarily stop the misfires, the underlying issue causing the misfires will persist. The code requires diagnosis and repair to clear.
How do I fix P0313 myself?
Start by filling your fuel tank and clearing the code. If it returns, check your fuel pressure with a gauge. Inspect spark plugs and ignition coils for wear. If fuel pressure is low, consider replacing the fuel filter (if external) or the fuel pump. You can also try a fuel injector cleaner.
How much does it cost to fix P0313?
The cost to fix P0313 varies depending on the cause. DIY repairs can range from $50 for spark plugs to $400 for a fuel pump. Professional shop repairs typically cost $150 for spark plugs up to $1000 or more for a fuel pump replacement.
P0313 keeps coming back - why?
If P0313 keeps returning, it means the root cause was not fully addressed. Common reasons for recurrence include an intermittent fuel pump issue, a partially clogged fuel filter, a vacuum leak that was missed, or a failing fuel injector that wasn't properly diagnosed.
Will P0313 fail emissions/smog test?
Yes, P0313 will cause your vehicle to fail an emissions or smog test. Any active misfire code indicates a problem with engine combustion and emissions control, preventing you from passing.
What's the difference between P0313 and P0300?
P0300 indicates a random or multiple cylinder misfire without specifying a particular cylinder. P0313 is more specific; it indicates that misfires are occurring, but specifically when the fuel level is low, pointing towards a fuel delivery issue exacerbated by low tank levels.
P0313 on Ford F-150?
On Ford F-150s, P0313 often points to a failing fuel pump or a clogged fuel filter. The fuel pump module can also be a culprit. Always check fuel pressure first, especially when the tank is low, to confirm fuel delivery issues.
Questions to Ask Your Mechanic
Did you check the fuel pressure when the fuel tank was low?
Good answer: Yes, I monitored the fuel pressure at various fuel levels and found it dropped below specifications when the tank was under a quarter full.
What did you find when inspecting the fuel filter and fuel pump?
Good answer: I found the fuel filter was heavily restricted, or the fuel pump was drawing excessive current and not maintaining adequate pressure.
Repair Cost Estimate
DIY Repair
Parts only
$50-$400
Shop Repair
Parts + labor
$150-$1000
Save $100-$600 by doing it yourself
Difficulty
intermediate
Time
1-4 hours
Intermediate - requires specific tools like a fuel pressure gauge and an understanding of fuel system components, but many repairs are within reach for a confident DIYer.
Cost of Waiting
Continued misfires send unburned fuel into your exhaust system, rapidly overheating and destroying your catalytic converter. A $50-$400 repair now prevents a $800-$2,500 catalytic converter replacement later.
While You're In There...
If your vehicle has an external fuel filter, it's often accessed during fuel system diagnostics and is a common cause of P0313. Replacing it prevents future fuel delivery issues.
If replacing the fuel pump, the strainer is part of the assembly and should always be replaced to ensure clean fuel intake and prevent immediate recurrence of the issue.
Tools You'll Need
- OBD-II Scan Tool
- Fuel Pressure Gauge
- Basic Hand Tools (sockets, wrenches)
- Spark Plug Socket
- Torque Wrench
- Safety Glasses
- Gloves
P0313 is a common code that points to a fixable fuel delivery issue. Most repairs are straightforward, and addressing it promptly will prevent more expensive damage to your catalytic converter.
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Your Next Steps
Step 1: Fill your fuel tank and clear the code. If the code returns, proceed to fuel system diagnostics.
Step 2: Check fuel pressure at the rail. If pressure is low, inspect the fuel filter and consider replacing it. If the filter is clear, test the fuel pump's operation and consider replacement.
Step 3: If fuel pressure is good, inspect ignition components (spark plugs, coils) and test fuel injectors. Parts you'll likely need: a new fuel filter, a set of spark plugs, or a new fuel pump.