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P2279 Acura Code - Intake Air System Leak

- Code Popularity: 27,968 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P2279 Acura?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Vacuum hose misinstalled
  • Throttle body air leak
  • Intake manifold air leak
  • Evaporative Emission (EVAP) canister purge valve failure
  • Valve timing incorrect
  • Manifold Absolute Pressure (MAP) Sensor range/performance problem
⚠ Does your Acura have Safety Recalls? → Check here

How to Fix the DTC P2279 Acura?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

There is a factory service bulletin for the following Acura Models:

- 2013-2014 Acura ILX
- 2003-2013 Acura MDX
- 2007-2013 Acura RDX
- 2005-2012 Acura RL
- 2014 Acura RLX
- 2004-2013 Acura TL
- 2004-2013 Acura TSX
- 2010-2012 Acura ZDX

Just cleaned or replaced the throttle body and now you've got one or more of these symptoms?

- Fluctuating idle
- MIL on with DTC P2279 (intake air system leak)
- MIL on with P0507 (idle control system RPM higher than expected)

What's probably happened is the throttle plate is now in a different position from the one the ECM/PCM had learned.

To fix this problem, the ECM/PCM has to relearn the current closed throttle position.

1. Make sure all electrical items (A/C, audio unit, defogger, lights, etc.) are off.
2. Start the engine with the shift lever in P, parking brake on, and hold the engine speed at 3,000 rpm until the radiator fan comes on.
3. Let the engine idle for 10 minutes with the throttle fully closed.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2279 Acura code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2279 Acura Description

The Positive Crankcase Ventilation (PCV) system reduces Hydrocarbon (HC) emissions. The PCV system recirculates unburned air/fuel mixture (blow-by gas) into the intake manifold so that it is drawn into the engine and burned, thus reducing HC. If the PCV hose comes off at idle with the throttle closed, the amount of air supplied to the engine is considerably more than the amount of air the idle control system supplies. The Powertrain Control Module (PCM) estimates the amount of air supplied to the engine while the throttle valve is fully closed, and if the estimated amount is more than the upper limit, it detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P2279 Acura - Intake Air System Leak - AutoCodes.com
P2279 Acura Code - Intake Air System Leak

Need More Information on the Code?

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Code P2279 Acura comments

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