Question about 1998 Volkswagen Jetta

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Incorrect air flow air pump not coming on

Air pump is not coming on start up or any other time but pump is good computer says incorrect air flow i would quess it the egr valve or pump swich from dont know

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  • 16 Answers

Check the air bypass valve.

Posted on Nov 29, 2012

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Posted on Jan 02, 2017

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  • 69 Answers

SOURCE: p0171 lean code will not go away. changed fuel

Double check the very small hose that comes off of the manifold, since it sits so close to the manifold, I would not be surprised to find it frail and broken.

If you have tried everything else, have you had the code cleared after you changed out the parts? try having it cleared again....

Posted on Aug 21, 2009

  • 225 Answers

SOURCE: 2005 Golf TDI Diesel - EGR "Emissions workshop" fault light

Hi, The EGR valve itself is on a set of flexible pipework - usually stainless steel - which runs between the inlet manifold and the exhaust manifold. The EGR actuator valve is pneumatically / vacuum operated by a solenoid valve, controlled by the ECU ( aka the brane). It's not usual for the EGR valve itself to fail, more likely the solenoid valve or its electrical connector getting dirty. If you google for VAG TDI N75 valve you should get all the info you could possibly ever need :-)

Hope this helps, D.

Posted on Jul 16, 2008

  • 62 Answers

SOURCE: 2008 bettle secondary air injection sys incorrect flow

the air pump should start when car is cold, if you do not hear a small airplane under your hood, than it is not functioning, if you do, you'll need to do other diagnosis (checking vaccum lines most likely), but being such a new car, a dealer would probably be under warranty.

Posted on Jul 07, 2009

emissionwiz
  • 76846 Answers

SOURCE: my check engine lite is

More than likely the secondary air injection motor has failed, this is the case most of the time, check all the hoses and verify the connection's and if u find nothing openly wrong replace the secondary air injection pump assembly.

Posted on Sep 03, 2010

  • 64 Answers

SOURCE: 97 Jetta Secondary Air Injection System Incorrect Flow

the air pump is located on the engine towards the front of the vehicle and has apx. 3/4 diameter pipes running to and from it. it is apx. 2 fists in size and it is black plastic. one of the lines on top of the air pump runs to the other side of the engine towards the firewall. at the other end of that pipe is the valve. disconnect that pipe while the vehicle is running. no air out of the pipe means bad pump. air coming out of the pipe means bad valve

Posted on Feb 13, 2011

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2008 Trailblazer P0411 code


The Secondary Air Pump is turned on and off by the ECU. The ECU looks at live data from the O2 sensors. The flow rate and direction of flow, is controlled by the cutoff valve. I believe this is what you are looking for. GM has a few different arrangements so you will have to call the parts department at the Dealership and they will tell you whether you have a cutoff valve, check valve, solenoid, or if is controlled by the air pump itself. If there are anymore questions feel free to write back. Please let me know how the repair is going, good luck.

Mar 17, 2014 | Cars & Trucks

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My 1996 dodge ram 1500 v8 5.9 check engine light is on. Also when I start the truck it doesn't stay running it stalls unless I give it a lot of gas and go. A buddy of mine has a scanner and the codes...


It is stalling because of incorrect air/ fuel ratio is wrong. Rectify all the codes and it will run properly. Remember that it is computer controlled so if all the sensors are operating as designed then the computer will adjust the settings to make it run right. .

Sep 29, 2013 | Cars & Trucks

1 Answer

I have a 1986 gts corrolla that will not run unless air flow meter is held open


Now if your old fuel pump was loosing pressure it tends to lean out Overheating your catalytic converter and melting it so exhaust gasses can't flow To test this is easy just remove the two bolts holding it on the engine pipe Start the engine if runs fine replace cat converter

Sep 15, 2012 | 1986 Toyota Corolla 2 Door

2 Answers

What is scanner code PO411


code po411 secondary air injection system incorrect flow,possible causes , faulty air pump or faulty air pump vacuum valve or faulty check valve.

Apr 06, 2011 | 1999 Volkswagen Cabrio

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I bought a 1997 Chevy Blazer that was not running. I put a new battery in it and checked for spark. It had spark going to the main wire on the distributor, but the fuel pump was not pumping. I sprayed...


An engine needs 3 things to run fuel, spark, and air, but they must occur at the proper time, that being said, buy, or borrow a noid light. This is a light that you can plug into the injector to see if it is getting the pulse from the computer, do not use a test light, you will fry the computer for sure. If the injector pulse is there you have to check the timing to be sure the timing chain has not jumped. Bring the number one cylinder up on top dead center of the compression stroke, then pull the distributor cap off and make sure the rotor is pointing at the place on the cap where the number one wire is hooked on. If it is the timing is good, if not it is possible that the timing chain has jumped or someone has installed the spark plug wires incorrectly.

Jul 25, 2010 | 1997 Chevrolet Blazer

2 Answers

Air system problem, engine code 0411 what could be the problem.


CODE PO411 SECONDARY AIR SYSTEM INCORRECT UPSTREAM FLOW DETECTED.POSSIBLE CAUSE / AIR PUMP OUT PUT IS BLOCKED./ AIR BYPASS SOLENOID LEAKING OR BLOCKED./AIR BYPASS SOLENOID IS STUCK OPEN OR STUCK CLOSED./ AIR PUMP INJECTION PUMP HOSES LEAKING. / OR PCM HAS FAILED.

Oct 23, 2009 | 1996 Mercury Sable

1 Answer

The check engine light is on and the code say 411 p


Although this particular code is not generic for many years because the system the code deals with is on a limited range of grand prix, I looked at info for a 2005 grand prix 3.8 liter. P0411 Secondary air injection incorrect air flow detected. Deals with The air injection pump, hoses, and switching valve(s) could all be at fault. Water and impact damage to the pump is common, as is stuck switching valve. Hoses can break or come off. The pump itself you should hear run shortly after starting the car(most times). It sounds like a very high pitch vacuum cleaner. There are a range of specific diagnostic test dealing with this particular code.

Good luck.

Sep 03, 2009 | Pontiac Grand Prix Cars & Trucks

1 Answer

No fire


check cold start injector relay and injector. are u sure that fuel pump is good? can u hear it come on when key is turn to on ? it should come on for about a second if yes check for fuel from injectors , pull one injector put from head point into glass jar remove rubber boot from air flow sensor assembly, pull fuel pump relay and install jumper so fuel pump contiously runs then using a magnet pull up on air flow sensor fuel should be coming out of injector in a cone shape.

Aug 05, 2009 | 1991 Volkswagen Jetta

1 Answer

97 Jetta Secondary Air Injection System Incorrect Flow


the air pump is located on the engine towards the front of the vehicle and has apx. 3/4 diameter pipes running to and from it. it is apx. 2 fists in size and it is black plastic. one of the lines on top of the air pump runs to the other side of the engine towards the firewall. at the other end of that pipe is the valve. disconnect that pipe while the vehicle is running. no air out of the pipe means bad pump. air coming out of the pipe means bad valve

Jul 18, 2009 | 1997 Volkswagen Jetta

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