When it comes to diagnosing Honda vehicles, the Honda trouble code P2279 is an indication of an intake air system leak. This code is triggered when two conditions are met. The first condition is when the estimated volume of intake air is 310 l/min (327.6 US qt/min, 272.8 lmp qt/min) or more when the MAP value is 35 kPa (10.3 in. Hg, 260 mmHg). The second condition is when the estimated volume of intake air is 302 l/min (319.2 US qt/min, 265.8 lmp qt/min) or more when the MAP value is 62 kPa (18.2 in. Hg, 460 mmHg). As a professional automative technician, it is important to recognize the Honda Code P2279 as this will help you to identify and troubleshoot the underlying problems.
Causes and Solutions for Honda Code P2279
| Cause | Solution |
|---|---|
| Vacuum leaks at the PCV valve, the PCV hose, the purge (PCS) line, the throttle body, the intake manifold, and the brake booster hose | Check the vacuum system for leaks and repair any that are found. |
| Incorrect camshaft timing | Check the camshaft timing and adjust as necessary. |
| Faulty Mass Air Flow (MAF) sensor | Replace the MAF sensor. |
| Damaged vacuum lines | Replace any damaged vacuum lines. |
Vacuum Leaks
The Honda Code P2279 indicates a vacuum leak, which can be caused by a faulty PCV valve, PCV hose, purge line, throttle body, intake manifold and brake booster hose. If any of these components are leaking, the engine will not be able to maintain the correct air/fuel mixture, resulting in a decrease in performance and fuel economy. To diagnose and repair this issue, technicians must inspect the vacuum system for leaks and replace any faulty components.
Incorrect Camshaft Timing
In some cases, the Honda Code P2279 can be caused by incorrect camshaft timing. This can occur when the camshaft sprocket or timing chain has slipped, or if the timing belt has been incorrectly installed. If this is the case, technicians must check the camshaft timing and adjust it as necessary in order to correct the issue.
Faulty Mass Air Flow Sensor
Another common cause of the Honda Code P2279 is a faulty Mass Air Flow (MAF) sensor. The MAF sensor measures the amount of air entering the engine and transmits this information to the vehicle’s computer. If the MAF sensor is faulty, it will cause the engine to run rich or lean, resulting in decreased performance and fuel economy. To fix this issue, technicians must replace the MAF sensor.
Damaged Vacuum Lines
The Honda Code P2279 can also be caused by damaged vacuum lines. Vacuum lines are essential for the engine to maintain the correct air/fuel mixture, so any damage to these lines can result in decreased performance and fuel economy. To fix this issue, technicians must inspect the vacuum lines for damage and replace any that are damaged.
Conclusion: Diagnosing and Repairing Honda Code P2279
The Honda Code P2279 is an indication of an intake air system leak, which can be caused by a variety of issues such as vacuum leaks, incorrect camshaft timing, faulty Mass Air Flow sensors and damaged vacuum lines. As a professional automotive technician, it is important to recognize the Honda Code P2279 in order to properly identify and troubleshoot the underlying problems. By following the correct diagnostic and repair procedures, technicians can successfully diagnose and repair Honda Code P2279, restoring the vehicle to peak performance and fuel economy.
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