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Leak air intake

Code p2779

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P0455 and P0302


The P0455 has nothing to do with a air intake leak ! An it would have nothing to do with a P0302 . A air leak , vacuum leak would cause a P0300 random misfire . You have a coil or spark plug wire or spark plug breaking down at higher RPM ! A vacuum leak would not affect higher speed . P0455 Evaporative Emission Control System Leak Detected Gross Leak

Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

Mar 25, 2017 | Cars & Trucks

1 Answer

I have the codes are po171 ..po174


code p 0171 refers to system too lean bank 1===causes --intake /exhaust leak---air system---MAF/VAF sensor--fuel pressure / pump---injector/ s---HO2S
code p 0172 refers to system too rich, bank 1===causes --intake blocked ---EVAP canister purge valve --fuel pressure --EGR system---injector/s -=-- HO2S
code p 0173 refers to fuel trim(FT) bank 2--malfunction===causes --intake leak---air system--fuel pressure /pump---injector/s --EVAP canister purge valve---HO2S
code p 0174 refers to system too lean, bank 2===causes intake / exhaust leak---fuel pressure /pump---injector/s---Air system---hose connection/s
I was not sure if you wanted all codes or just the first and last, however you will see that there are some common problems that may help point you in the right direction
1-- is the heated oxygen sensor (HO2S) which is the sensor before the cat converter
2--is the fuel pressure , so a fuel pressure test will determine if a regulator or fuel pump problem,
3--EVAP canister purge valve --replace as required
4--intake / exhaust leak --check for vacuum hose failure including hoses to vent controls and check the flexible exhaust connection before the cat converter for leaks
The rest are there to check if you haven't fix the fault before you get to them

Nov 05, 2015 | Cars & Trucks

2 Answers

Code p0507


possible causes are:

Dirty throttle body
Electric throttle control actuator incorrectly adjusted/faulty/damaged
Air leak on Intake
Poor electrical connection to the Intake Air Control valve

P0507 KIA Idle Air Control IAC System RPM Higher Than Expected

May 14, 2014 | 2003 Kia Sedona

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

How do I fix a vacum leak on 2002 nissam sentra gxe


You have to find the leak and seal it up, hey. It may help to picture where vacuum originates in the engine: As the pistons move down in the cylinders they pull air in from the intake manifold. This creates a pressure drop in the intake, a vacuum that is maintained as the engine is running. New air that is pulled into the intake is measured by the Mass Air Flow sensor mounted in the big boot between the air filter and the intake. If extra air is pulled into the intake manifold from a vacuum leak, uncalibrated air, the computer can figure it out from the oxygen sensors reading in the exhaust-mixture is too lean, so the computer will try to compensate by delivering more fuel, but can't deliver enough, mix is still too lean, so computer sets a code for the vacuum leak.
The intake will have a few vacuum taps with hoses running to engine or car controls that require vacuum to operate. If one of the hoses comes off or has a leak, that is extra air into the intake. Your power brake booster has a large vacuum tap. That may be the problem. With the engine running, pull off that line and plug it, and see if engine speed changes. If the idle drops that may be your leak-a failed power brake booster.
If nothing yet, keep engine running and spray some starting fluid around the mounting area of the intake manifold (maybe the intake gasket has failed and sprung a leak) and listen for a change in engine pitch or speed. The fluid may get sucked into the intake and cause speed to change. If it does, you would need to remove the intake manifold and fit a new manifold gasket.
Also check the big boot from the air filter to the throttle body for tears or loose fit. Good luck, Rev!

Nov 30, 2012 | Cars & Trucks

1 Answer

HOW TO FIX CODES 171 AND 174


fault code p0171 is system too lean bank 1.................. intake/exhaust leak. air system MAF/VAF sensor. Fuel pressure/pump , injectors HOS2.

fault code p0174 is system too lean bank 2...................intake exhaust leak, fuel pressure/pump , injector(s) Air system, Hose connectors

hope this helps you

Jan 07, 2012 | 1999 Ford Ranger SuperCab

3 Answers

Hi i have got a p103 code on my obd meter with check engine light on . vw 1998 golf 2.0 litre manual no turbo failed emmissions test.


P0103 Mass or volume airflow circuit high input, for this code the fix is either your MAF is disconnected or look at the duct tube for any tears that will give false air.

Jun 13, 2011 | Volkswagen Golf Cars & Trucks

1 Answer

HAVEA 2004 SUZUKI FORENZA HAS A CODE OF P2779 & IT HAS NO INTAKE LEAKS


CODE P2779 IS TRANSMISSION GEAR SELECTION SWITCH DOWNSHIFT RANGE PERFORMANCE PROBLEM.POSSIBLE CAUSE COULD BE IN THE WIRING OR TRANSMISSION GEAR SELECTION SWITCH FAULTY.

Sep 03, 2010 | Suzuki Forenza Cars & Trucks

2 Answers

Ecm codes are po174 po171 states to check MAF sensor or suspect fuel pressure. vehicle runs fine until you come to a stop or it is idling


Take a look at the rubber elbow on the back of the throttle body. It is under the plastic throttle body cover. This elbow can crack and allow un metered air into the system.

In this picture, it is just above the oval around the IAC

2f531f1.jpg

Also check the intake & air filter housing. If you just replaced the airfilter, the intake could have an air leak after the MAFS ( Mass Air Flow Sensor ). The MAFS is in the housing that the air filter is in.

Feb 26, 2010 | 2003 Ford F150 Regular Cab

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