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P0274 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


The P0274 DTC code is a specific code within the On-Board Diagnostics II (OBD-II) system, which is used in modern vehicles to monitor the engine’s performance. Specifically, P0274 is related to an issue with one of your vehicle’s fuel injection systems. Let’s take a look at the meaning of this code:


The OBDII code P0274 is a generic OBD II code which, depending upon your vehicle model and makes, may have slight differences in the particular meaning. However, P0274 indicates that there is a problem with the fuel injection system in 6 of your engine, in most cases. To achieve optimum engine performance, the fuel injector plays a key role by feeding the correct amount of fuel into the combustion chamber.


Let’s investigate the typical causes of the P0274 code now that we are aware of what it means:

  • Faulty Fuel Injector: The primary cause of P0274 is a malfunctioning fuel injector in cylinder 6. This can result from wear and tear, clogging, or electrical issues.
  • Wiring or Connector Problems: Damaged or corroded wiring or connectors associated with the fuel injector can trigger the code.
  • Issues with fuel delivery: This code can indicate inadequate fuel delivery to the cylinder, which may be caused by a blocked fuel line or a shoddy fuel pump.


  • You could suffer several symptoms when the P0274 code is activated, including:
  • Check Engine Light: The check engine light on your dashboard turning on is the most typical sign.
  • Reduced Engine Performance: The effectiveness and power of your engine may start to decline.
  • Rough Idling: When the engine is idling, it may run unevenly or vibrate.
  • Increased Emissions: Due to faulty combustion, the vehicle may produce additional pollutants.


Diagnosing the P0274 code typically involves the following steps:

  • OBD-II Scanner: A mechanic will use an OBD-II scanner to retrieve the code and gather information about the issue.
  • Visual Inspection: The fuel injector, wiring, and connections will all be visually inspected to look for any evident issues.
  • Testing the Injector: The performance and resistance of the fuel injector in cylinder 6 will be examined.

Common mistakes

  • Avoid making the following typical errors when working with the P0274 code:
  • Disregarding the law: Ignoring the P0274 code and the check engine light might result in more serious engine issues and reduced fuel economy.
  • Replacing Parts Without Diagnosis: Avoid replacing the fuel injector or related components without proper diagnosis, as this can be costly and ineffective.

How serious is this?

The severity of the code P0274 will be determined by how we deal with it. In the long term, failure to do so could lead to increased fuel consumption, a reduction in engine performance, and possibly more serious engine damage. These issues can be prevented and the vehicle will run properly if they are addressed promptly.

What repairs can fix the codeS?

repair manuals

To resolve the P0274 code, you may need to:

  • Replace the faulty fuel injector in cylinder 6.
  • Repair or replace damaged wiring or connectors.
  • Address any fuel delivery issues, such as a clogged fuel line or a weak fuel pump.

Related codes

Other related codes that may appear alongside P0274 include:

  • P0267: Cylinder 3 Injector Circuit Low
  • P0268: Cylinder 3 Injector Circuit High
  • P0269: Cylinder 3 Contribution/Balance Fault


After all, the P0274 DTC code for cylinder 6 of your engine appears to indicate some kind of fuel injection problem. Although it may have an impact on the performance of your vehicle or emissions, this is a problem that can be addressed by correct diagnosis and repair. A more substantial issue can arise if the code is ignored or decisions are made without a diagnosis.

If the P0274 code has been encountered, it is recommended that you consult a qualified mechanic who will make sure that your vehicle operates properly and effectively.

P0274 Code – What Does It Mean & How To Fix It