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Error Code P2279: What It Means & What To Do?

OBD Code P2279 - Intake Air System Leak

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The trouble code P2279 can be defined as Intake Air System Leak. It is a generic code for the engine control module detecting a vacuum leak into the engine. It would mean that unmetered air is entering the engine without the engine sensing it going through the mass air flow sensor as well as the throttle body.

Learn More About OBD Error Code P2279

The car engine utilizes a mass airflow sensor or MAP sensor to decide the amount of air which would enter the intake manifold. The mass airflow sensor utilizes a "hot wire" for this purpose. The MAP sensor would then signal the pressure within the manifold.

 

What causes this problem with the Intake Air System Leak?

 

  • Leakage in between engine side of mass airflow sensor and air duct
  • Air duct draining engine side
  • There might be a leak at intake air temperature sensor
  • Issues related to the leak at throttle body
  • Malfunctioning intake manifold
  • The vacuum hose might be flawed
  • There can be inoperative fuel injector seal at manifold
  • The brake booster vacuum hose might be leaky
  • There might be a leak under dash at a vacuum operated device
  • PCV valve might be stuck
  • Stuck crankcase oil filler cap
  • Anything and everything which is connected to the intake manifold might potentially cause this scenario

Replace/Repair These Parts To Fix Code P2279

  1. Engine Control Module - There can be some engine performance issues due to faulty engine control module. If the ECM fails or has any problems it can lead to performance issues with the vehicle like misfires, hesitation, loss of power, and sometimes even decreased fuel economy.
  2. Throttle Actuator Connector - If the throttle actuator connector is faulty, it may result in the throttle pedal not opening in time and causing improper throttle response and sluggish acceleration. Thus, replace it now!
  3. Powertrain Control Module - PCM stands for powertrain control module. It is a car part, a control unit which is utilized on motor vehicles. It is generally a combined control unit, consisting of the engine control unit (ECU) and the transmission control unit (TCU).
  4. Electronic Control Unit - If your automobile's check engine light remains on constantly, and never goes off, there's a good chance that your vehicle has a damaged electronic control unit. There are a lot of reasons why a car's check engine light will remain on. The most common reason is a defective ECU.
  5. Diagnostic Tools - It is always advisable to use correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in efficient manner. Buy new quality diagnostic tools from us today!

Symptoms Of The OBD Error Code P2279

Our main motive is to achieve customer satisfaction as for us our customers are everything and that’s why we will help you to diagnose P2279 code by mentioning some major symptoms below:

 

Common Symptoms

 

  • The service engine soon light can start lighting up
  • The car engine might start running roughly or may stall if there is major leak in the vacuum
  • Engine might start running lean
  • Issues related to engine misfire
  • Rise in the fuel mileage

How To Correct Intake Air System Leak Issue

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2279:

 

  • Make sure to relearn the throttle position for the ECM
  • Rehabilitate the leaking intake gaskets or seals
  • Carefully adjust the faults in the PCM
  • The ECU should be restored to working order
  • Recondition the non-functioning PCV valve or hose

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Easy Diagnosis Of Engine Error OBD Code P2279

Here are some steps which you should follow in order to diagnose this fault code:

 

  • This is a general type of error code which is diagnosed with the help of a scanner.
  • The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data.
  • If he happens to find any additional error codes, he has to address them as well.
  • Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears.
  • If the error code does not return, then there can be an erratic condition.
  • Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective.
  • Check engine for any vacuum leaks, broken, or loose vacuum hoses or air inlet hoses for error.
  • Also remove the PCV valve and inspect to make sure it is not stuck in the open position.
  • Parts or components of the throttle body should be checked to see if it was recently cleaned and then allow relearning of the throttle position.
  • If all the components seem to work perfectly, inspect the PCM for faults and replacement along with reprogramming.

 

Common Mistakes When Diagnosing The P2279 Code

 

  • Most of the technicians make huge mistake of clearing the ECM memory codes before inspecting the freeze frame data for the main failure issue, so the failure may be duplicated and repaired.
  • Another mistake might be to clean the throttle body and not relearning the throttle position again.
  • Many mechanics simply adjust the throttle plates to compensate for a vacuum leak.