AutoFixDB - Free OBD-II diagnostic trouble code lookup. Find causes, symptoms, diagnostic steps and repair solutions.

Overview

P0313 indicates detection of an engine misfire while the fuel level is low, commonly due to low fuel tank levels exposing the pump and causing a lean condition, but may also be linked to fuel delivery, sensor, and ignition issues.

Common Symptoms

Check Engine Light illuminated
Rough idle or engine vibration
Hesitation on acceleration
Loss of engine power
Hard or no-start condition

Most Common Causes

Fuel tank low exposing fuel pump leading to intermittent fuel delivery high

Low fuel level is the most frequently reported trigger for P0313.

Faulty or weak fuel pump medium

Fuel pump failing to maintain adequate pressure especially when fuel level is low.

Clogged fuel filter medium

Restriction in fuel flow can mimic low fuel delivery conditions.

Faulty fuel pressure sensor or incorrect signal medium

Sensor errors can report low pressure leading to misfire detection.

Ignition system faults (spark plugs, coils) contributing to misfire low

While primarily a fuel-related code, ignition issues may also manifest in misfires.

Diagnostic Steps

Check actual fuel level in tank

Expected: Fuel above low threshold (refill if needed)

Interpretation: If code clears after refueling, likely just low fuel condition.
Connect professional scan tool and read live fuel pressure data

Expected: Fuel pressure within manufacturer spec at idle and under load

Interpretation: Low pressure supports fuel delivery issue beyond simple low tank level.
Inspect fuel pump and fuel filter for operation and flow

Expected: Consistent fuel flow and pressure

Interpretation: Restricted or weak flow indicates component replacement needed.
Check wiring/connectors to fuel pump and pressure sensor

Expected: No corrosion/damage, secure connections

Interpretation: Electrical issues can cause intermittent low pressure readings.
Evaluate ignition components if fuel delivery is good

Expected: Good spark and no ignition misfire codes

Interpretation: Ignition faults may exist independently but can exacerbate misfire detection.

Repair Solutions

Refill fuel tank to adequate level easy

Estimated Cost: $10 - $50

Often resolves code if no underlying issues exist.

Replace fuel filter medium

Estimated Cost: $50 - $150

Clears flow restriction that can compound low fuel issues.

Replace faulty fuel pump hard

Estimated Cost: $300 - $1200

Required when pressure tests show inadequate delivery.

Repair or replace fuel pressure sensor/wiring medium

Estimated Cost: $100 - $400

Sensor issues can mimic low fuel conditions.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

Assuming code solely due to fuel level without verifying fuel system health

Frequently Asked Questions

Technical definition of P0313 OBD-II Code

The P0313 code stands for Misfire Detected With Low Fuel. This generally indicates an issue with the Fuel System system.

How serious is the P0313 code?

The P0313 code is considered medium severity. Engine may run rough, hesitate on acceleration, lose power, or stall when fuel level is low or underlying system issues are present.

Symptoms associated with DTC P0313

Drivers often report: Check Engine Light illuminated, Rough idle or engine vibration, Hesitation on acceleration when this code is present.

Common triggers for the P0313 error

It can be caused by several factors, most notably: Fuel tank low exposing fuel pump leading to intermittent fuel delivery, Faulty or weak fuel pump, Clogged fuel filter.

What is the price difference for fixing P0313?

Expect to pay around $50 if the issue is a Refill fuel tank to adequate level, but up to $1200 if the Replace faulty fuel pump needs replacement.

Is the P0313 code specific to Honda?

This is a universal code. You might see P0313 on Ford, Chevrolet, Toyota, Honda, Nissan, or any other OBD-II vehicle.

P0313: Misfire Detected With Low Fuel