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P0275 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.


In the OBD II system used to monitor engine performance on modern vehicles, P0275 DTC is a unique code that will only be available in OnBoard Diagnostics II. Specifically, P0275 addresses an issue with a fuel injection system in your vehicle. Let’s take a look at what this code means:


OBDII P0275 is a generic OBD II code, and its particular value may change according to the vehicle manufacturer or model. However, P0275 indicates that there is a problem with the fuel injection system in cylinder 5 of your engine in most cases. To achieve optimal engine performance, the fuel injection shall play the role of delivering the right quantity of fuel into the combustion chamber.


Now that we are aware of what the P0275 code means, let’s investigate some of its typical causes:

  • Faulty Fuel Injector: The primary cause of P0275 is a malfunctioning fuel injector in cylinder 5. 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 P0275 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 P0275 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 cylinder 5 fuel injector will be evaluated.

Common mistakes

When dealing with the P0275 code, avoid these common mistakes:

  • Ignoring the Code: Ignoring the check engine light and the P0275 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 P0275 code is dependent on how you deal with it. In the long run, ignoring it can lead to greater fuel consumption, reduced engine performance, and potentially more serious engine damage. These issues can be avoided by fixing them as soon as possible, and your car will continue to function properly.

What repairs can fix the codeS?

repair manuals

To resolve the P0275 code, you may need to:

  • Replace the faulty fuel injector in cylinder 5.
  • 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 P0275 include:

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


The following conclusion is drawn from the P0275 DTC code: there’s a special issue with the fuel injection system at cylinder 5 of your engine. This problem can affect the performance and emissions of your vehicle, but appropriate diagnostics and repairs are capable of resolving it.

More pressing problems can arise if you disregard the code or make rash decisions that don’t reveal a diagnosis. To ensure your vehicle runs smoothly and efficiently,  contact a professional mechanic if you encounter the P0275 code.

P0275 Code – What Does It Mean & How To Fix It