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P0277 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.


A specific code that is part of OBD Diagnostics II, a system for monitoring engine performance applied to today’s vehicles, is P0277 DTC. Specifically, P0277 relates to an issue with one of your car’s fuel injection systems. 


The OBD II code P0277 is a generic OBD II code, and depending on your vehicle’s make and model, its specific meaning may vary slightly. However, P0277 indicates that there is a problem with the fuel injection system in six of your engines in most cases. To ensure engine performance, it is the fuel injector’s job to get the correct quantity of fuel into the combustion chamber.


Now that we are aware of what the P0277 code means, let’s investigate some of its typical causes:

  • Faulty Fuel Injector: The primary cause of P0277 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 some symptoms when the P0277 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 P0277 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

When dealing with the P0277 code, avoid these common mistakes:

  • Ignoring the Code: Ignoring the check engine light and the P0277 code can lead to more severe engine problems and decreased fuel efficiency.
  • 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 seriousness of the P0277 code can be assessed in terms of how it’s dealt with. If this is not corrected, it can result in higher fuel consumption, reduced engine performance, and the potential for severe engine damage over time. These problems can be prevented by addressing them immediately and keeping the vehicle running smoothly.

What repairs can fix the codeS?

repair manuals

To resolve the P0277 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 P0277 include:

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


Finally, it should be noted that a specific fuel injector problem was reported by the P0277 DTC code for cylinder 6 of your engine. This is a problem that can be resolved with the correct diagnosis and repair, although it may have an impact on your vehicle’s performance and emissions.

If we ignore the code or make rushed decisions without a diagnosis, there are more important issues to be addressed down the road. It is recommended that you consult a qualified mechanic to ensure the smooth and efficient functioning of your vehicle if P0277 codes are encountered.

P0277 Code – What Does It Mean & How To Fix It