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Fault code p2279 air system leak cannot see any pipes leaking

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My audi tt engine light came on aa bloke got codes p2187 p2279 p0507 p0441 p1093


P2187: System Too Lean at Idle Bank 1
http://www.autocodes.com/p2187.html

P2279: Intake Air System Leak
http://www.autocodes.com/p2279.html

P0507: Idle Air Control System RPM Higher Than Expected
http://www.autocodes.com/p0507_audi.html

P0441: EVAP System Incorrect Purge Flow
http://www.autocodes.com/p0441_audi.html

P1093: Fuel Trim 2 Bank 1 Malfunction
http://www.autocodes.com/p1093_audi.html

Nov 06, 2016 | Audi Cars & Trucks

2 Answers

Timing chains and actuator replaced, now i have a code PO2279


P2279 is the code for Air Intake System Leak. Smoke checks are ok, but hard to see in places like the underside of the intake manifold. SInce your compression is good and even, chances are that the problem is at the intake manifold gasket.

Sep 21, 2014 | Cars & Trucks

1 Answer

Look up codes p2279 for 2005 Jetta (New Body Style


Intake Air System leak If car was serviced check your air cleaner for all connections they may have left a vent hose off

Aug 19, 2014 | Cars & Trucks

1 Answer

Honda has two fault codes P0507 and P2279. This is after I repaired the fuel injection wiring that was lunch for a Rat.. Engine runs idles high and then low. suspect air leak. 2003 4 cyl. 87000 miles


Yes I agree with the air leak theory. Code 507 actually means the computer can not bring the idle speed down using the iac valve.
Look for a vac leak between the throttle body and intake or something holding the throttle plate open.

Feb 13, 2014 | 2003 Honda Accord

1 Answer

The code on 2005 suzkui forenza is p2279 say i have a vaclum leak and to change egr gasket have done that and still the vaclum leak its said i have any way to fine the leak


The code is for an intake leak, not just the EGR valve.
In most cases the leak is the hose to the valve cover or one of the hoses to one of the sensors is damaged.
Check the hoses, and if you replace anything make sure you disconnect the battery to clear the memory of the computer.

Aug 24, 2012 | 2005 Suzuki Forenza

1 Answer

02 stratus, 3.0, Code PO171, Lean on # 1 bank? Could this be something "other" than injectors?



It would help if you could get the car scanned with vag-com, it will show the full fault code.

P0171/ Fuel Trim; Bank 1: System Too Lean
Possible Causes

* Mass Air Flow Sensor defective

Possible Solutions

* Check Mass Air Flow Sensor
* Check Fuel Pressure Regulation
* Check Fuel Pump
* Check Injectors
* Check Intake System for Leaks
* Check Exhaust System for Leaks
* Check Secondary Air System for Leaks
* Check Vacuum Pipes for Leaks

Mar 16, 2011 | 2002 Dodge Stratus

1 Answer

Intake air duct leak


All of those codes will come up as probable cause. The hand helds that auto stores use are not accurate. You need a certified mechanic with a Genesis , Snap On or a Mac scanner or the dealership. The actual problem could be causing any of these codes.

Sep 28, 2009 | 2005 Suzuki Forenza

1 Answer

Three trouble codes


Trouble Code: P0421


Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:

Air leaks at the exhaust manifold or in the exhaust pipes
Catalytic converter is contaminated, damaged or has failed

Front HO2S and/or the rear HO2S is loose in the mounting hole

Front HO2S older (aged) than the rear HO2S (HO2S is lazy)

Front HO2S or rear HO2S is contaminated with fuel or moisture


Trouble Code: P1173

HO2S-21 (Bank 2 Sensor 1) Circuit Malfunction

Possible Causes:

Base engine mechanical fault affecting one or more cylinders

EVAP Purge valve stuck or the hoses to the valve are reversed

Fuel metering fault (fuel injector sticking open or leaking)

Fuel pressure too low or too high, fuel supply contaminated

HO2S element is contaminated or the HO2S heater has failed

PCV system has air leaks at the valve or related hoses



Trouble Code: P0174
Adaptive Fuel Trim Too Lean (Bank 2)

Possible Causes:

Vehicle driven low on fuel or until it ran out of fuel

One or more injectors restricted or pressure regulator has failed

Fuel delivery system supplying too much or too little fuel during cruise or idle periods (e.g., faulty fuel pump, or dirty fuel filter)

Air leaks after the MAF sensor, or air leaks in the PCV system

Air leaks at the EGR gasket, or at the EGR valve diaphragm

Exhaust leaks before or near where the front HO2S is mounted

HO2S is contaminated, deteriorated or it has failed

Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)

Base engine -mechanical- fault affecting one or more cylinders

May 18, 2009 | 2001 Mazda MPV

1 Answer

Code P0171


Here are the possible causes for a PO171:

  • Base engine mechanical problem causing a lean A/F condition
  • Check for air leaks in the Air Induction system (e.g., in the intake manifold)
  • Check for air leaks in the exhaust manifold and in the exhaust pipes
  • Check for air leaks in the PCV system and in its related hoses and/or valve
  • Fuel control sensor is out of calibration (e.g., ECT, IAT or MAP)
  • Fuel delivery component fault (clogged filter, low fuel pressure)
  • HO2S has failed (it may be contaminated with fuel, silicone or water)
  • Vacuum hose is disconnected, broken, leaking or loose
Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!

Mar 20, 2009 | 1998 Honda Accord

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