Lawmaking Fault Location Probable Cause
P0313 Misfire detected -low fuel level
(Purchase Role On Amazon)		 Fuel system, mechanical fault

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Table of Contents

  1. What Does Code P0313 Mean?
  2. Where is the P0313 sensor located?
  3. What are the mutual causes of code P0313 ?
  4. Get Aid with P0313

What Does Lawmaking P0313 Mean?

OBD Two mistake code P0313 is a generic code that is defined as "Misfire detected -low fuel level", and is well-nigh normally fix when the PCM (Powertrain Control Module) detects a misfire on one or more than cylinders when the fuel level in the tank is below a minimum commanded level.

If this code sets when the fuel level is low, it is typically because the fuel level is then low that the pickup signal on the fuel pump is sometimes above the fuel level, which causes the fuel pump to "suck" air, which in turn, causes intermittent failures in the fuel supply to the injectors.  Annotation also that if code P0313 sets under low fuel conditions, it volition only exist after the engine has completed at to the lowest degree six total revolutions after starting, so only if the PCM has determined that the fuel level is below a predefined critical level.

Yet, code P0313 is amidst a group of cryptic codes, which if taken at face value, announced to be easily resolvable, but in practise though, code P0313 can also be set up even if the fuel tank is total. Thus, if it is sure that the fuel level is above the fuel pump pickup indicate,  it is oftentimes more than profitable to  approach this lawmaking from the standpoint of there sometimes not existence plenty fuel (relative to air) available at one or more than cylinders to complete the combustion process successfully. An air/fuel imbalance is about commonly due to large vacuum leaks that cause unmetered air to enter the engine, defective fuel injectors, and/or defective sensors that could include the MAF (Mass Airflow) sensor, IAT (Intake Air Temperature) sensor, and MAP (Manifold Accented Pressure level) sensor, among others.

An culling approach might exist to wait for problems that foreclose combustion on one or more than cylinders altogether: in the latter instance, the problem could be electrical, such every bit the absence of a spark, or mechanical, such as a fractional or complete loss of compression on one or more than cylinders.

In practical terms, the resolution of this code often depends on whether or non other codes are present along with P0313. More importantly, though, if other codes are nowadays, the repair steps required to resolve all codes depend entirely on which additional codes are present forth with P0313. For case, if the fuel level is known not to exist depression merely at that place are codes present (along with P0313) that relate to low fuel force per unit area, the fault clearly involves faults with the fuel organization, equally opposed to a low fuel level in the tank.

From the to a higher place information technology should exist clear that code P0313 could have many possible causes besides a low fuel level. However, most, if non all other possible causes volition almost certainly exist indicated by trouble codes that relate to specific issues other than a depression fuel level. In these cases, it is almost certain that P0313 had prepare as a reaction to other issues, as opposed to P0313 having been the cause of the additional codes.

Annotation that if other codes are indeed present along with P0313, one or more than of these codes could cause the PCM to initiate a failsafe or limp mode, particularly if in that location is a possibility that the misfire might damage the catalytic converter(s).

Where is the P0313 sensor located?

The paradigm above shows the blazon of damage (indicated past the white arrow) to the inlet ducting that might cause code P0313 to set in cases where the code did not set as the result of a low fuel level.

What are the mutual causes of lawmaking P0313 ?

It is perhaps worth noting that if there are no additional codes present forth with P0313, the about common cause of this code is an actual depression fuel level. However, while air leaks in the inlet ducting (equally shown in a higher place) often remain undetected until a thorough visual inspection of the inlet ducting is performed, vacuum leaks such as the one shown in a higher place tin can cause "lean running", or even  seemingly random misfire related codes, including P0313.

Other possible causes of lawmaking P0313 could include the following-

  • Defective fuel level indicator mechanism/estimate showing the fuel level to exist college than it actually is
  • Defective fuel pump
  • Damaged, shorted, disconnected, or corroded wiring and/or connectors that cause intermittent failures in the fuel pump'south ability supply
  • Clogged or dirty fuel filter
  • Defective fuel pressure regulator
  • Defective fuel injectors
  • Failed or declining PCM or other command module. Note that these are rare events, and the error must therefore be sought elsewhere before any control module is replaced

Other possible contributory causes of code P0313 that are non directly related to the fuel system could include the following, but note that these issues volition nearly certainly be indicated by codes that relate to a specific consequence-

  • Worn spark plugs
  • Degraded spark plug leads
  • Lacking ignition coils, or ignition roll packs
  • Defective crank position sensor and/or reluctor ring
  • Crank position and cam shaft position sensors non correlating
  • Damaged, or leaking engine valves that cause a loss of compression
  • Excessive carbon deposits on valve that inhibit the catamenia of the air/fuel mixture
  • Big vacuum leaks in the inlet tract
  • Defective MAF (Mass Airflow) sensor
  • Defective MAP (Manifold Absolute Pressure level) sensor
  • Defective barometric pressure sensor

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