Question about 1999 GMC Yukon

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Can you clean out a air check valve before deciding to replace it

I got a code P 1416 tells me to replace the air check valve however wanted to know if I can clean them and then rest light and see if it turns off for good

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If you get it apart then you may be able to clean it . A good carbon dissolver may do the trick but I would not waste my time as it may not seal properly when you have finished.. It may have a broken spring inside that you will not be able to replace as well.

Posted on May 11, 2014

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Posted on Jan 02, 2017

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2 Answers

My 93 camry start in it run i have new plugs starks plugs n cap and roller but when im driving in be at a stop light it sound like it want to cut off so i have to put it n netural in it the gas stop it...


sounds like its not getting enough of fuel. check or replace fuel filter. this will cause vehicle to die out at stops because when you come to a stop. the dirt settles to bottom of filter, and then its like it chokes out the fuel supply. Hope this helps! the reason it runs in netural, is because the engine is not under load.

Jun 10, 2014 | Cars & Trucks

1 Answer

I replaced my secondary air check valve on my 2001 chevy tahoe but code 1416 still comes up. what else can i check


here is what i found on p1416.



P1416 Chevrolet
P1416 Chevrolet - Secondary Air Injection System Bank 2
Possible causes
- Faulty Secondary Air Injection (AIR) pump
- Secondary Air Injection check valve bank 2
- Secondary Air Injection (AIR) pump electrical circuit fault
- Blocked Secondary Air Injection (AIR) system

When is the code detected?

The P1416 code is set when no O2 sensor voltage change is detected by the Engine Control Module (ECM).


Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)


P1416 Chevrolet Description
An Secondary Air Injection (AIR) pump is used on this vehicle to lower tail pipe emissions on start-up. The PCM supplies a ground to the AIR pump relay, which energizes the AIR pump. The Powertrain Control Module (PCM) monitors the HO2S voltages to diagnose the AIR system. During the AIR test the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors the HO2S voltages and short term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low and the short term fuel trim should go high.

Jan 23, 2014 | 2001 Chevrolet Tahoe

1 Answer

Hi, I have a 98 Honda Accord Ex V6 that showed the P0420 code and I was told that the catalytic converter needs to be replaced. So I replaced it and the check engine light came on with the P0401 code. I...


The error code p0420 does not rise only due to faulty catalytic converter but may also rise due to one of following reason:

1. Faulty rear O2 sensor

2. Damaged O2 sensor wiring

3. Exhaust leak

The error code p0401 indicates faulty Engine Gas Recirculation (EGR) valve. The remedy to the problem is:

a. Replace EGR valve

b. Repair damaged wiring of EGR valve

c. Clean the EGR valve tubing

Jun 27, 2013 | Cars & Trucks

1 Answer

Chevrolet Model 2001 Code 1416


Removal Procedure

Caution: Allow the engine to cool before servicing the secondary air injection AIR system in order to reduce the chance of severe burns.
1. Remove the clamp from the check valve.
2. Disconnect the AIR hose from the check valve.
3. Remove the check valve from the left side AIR pipe.
4. Remove the left AIR pipe from the exhaust manifold.
5. Before replacing a check valve, test the valve for proper operation.
5.1. Install a vacuum pump to the nipple side of the check valve, AIR pump side.

5.2. Pump the vacuum pump to 10 inches Hg and observe the gauge.

5.3. Replace the check valve if the vacuum bleeds down to zero within 5 seconds.


Installation Procedure

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

1.Install the check valve onto the AIR pipe.
Tighten the check valve to the AIR pipe to 23 N·m (17 lb ft).
2.Connect the AIR pipe to the exhaust manifold.
Tighten the AIR pipe to the exhaust manifold to 20 N·m (15 lb ft).
3. Install the AIR hose to the check valve.
4. Install the check valve clamp.

Jun 27, 2011 | 2001 Chevrolet Silverado

2 Answers

I have a 2002 ford taurus. check engine light is on. Auto Zone did a scan today and the error code was p1507 can you please tell me what i need to do to fix this problem.


possible problems

Vaccuum leak
failed IAC valve
open or short
air inlet plugged

P1507 means "Idle Air Control Underspeed Error". It can be most commonly caused by a vacuum leak, a damaged Idle Air Control (IAC) assembly or a stuck IAC valve that needs cleaning. Essentially, your engine isn't idling at high enough according to your computer's programming parameters. Many times this shows up in colder weather as you try and start your vehicle. It will usually die unless you put your foot on the gas pedal and raise the RPM's. I have also read where a clogged air filter might be the problem. I would try cleaning your IAC valve first.

Oct 14, 2010 | 2002 Ford Taurus

2 Answers

1996 Dodge Dakota 3.9 Starts and then shortly after dies. I can keep it running by giving it gas. I have cleaned the throttle body and replaced the PCV Valve. Does same thing. What other problems...


The Pcv Valve never really needs changing. It only regulates air flow thru the crank case, and can be cleaned ,with brake clean or mineral spirits. It has nothing to do other than that.
Cleaning the Throttle Body does little either,other than making it look nicer,unless it is sticking.
You may want to check out the Air Idle Control Valve or Solenoid,on the throttle body. That, you may be able to clean and free it up, or replace.
If getting it to idle and stay running is your only issue,I hope that helps.
If other issues, tell us what they are.

Aug 31, 2010 | 1996 Dodge Dakota

2 Answers

Code 1416 bank 2 2000 gmc jimmy


P1416 - Secondary Air Injection (AIR) system Bank 2
1416 means that you are running lean while the smog pump is on.
It could also be likely the vacswitch on the smog pump is the causes.

Jan 31, 2010 | 2000 GMC Jimmy

2 Answers

Check engine light on,idols rough,fine at all other speeds.


I decided to check the idol air control valve,when I removed it I found the problem right behind it. The P C V valve hose was just about into where it fastens to the intake,the other end was bad also. Cost me aout $6.00 Where auto parts stores were telling me parts would cost two or three hundred $$.

Jan 20, 2009 | 2001 Ford Escort ZX2

1 Answer

97 pathfinder hesitates bucks and stalls at lights, already put plugs distributer and mass air flow censor


Check throtle position sensor behind the TBI. Run mode 4 in the computer diagnostic checks to see what codes is giving.

By the way, if any of the sensors give a code, don't spend money replacing them. They are all inter related. If one fails you will get codes for the others also. What you really need to do is above suggestion and then trace the circuits for continuity. Am assuming you know how to run ECM codes in the computer. Eliminate codes one at a time, and re-run mode 4, until all codes have been eliminated.

If code 55 is in the computer. Replace the whole TBI. After 20 years of use, they appear to corrode inside. But try the below first in the interest of saving money.

You might want to remove the TBI. Don't disturb the pre heater underneath the TBI if is stuck to it.
Take choke cleaner (Pep Boys or Autozone) Carb and Choke Cleaner in yellow can. There is an opening in the pre heater for the Air Flow Sensor, liberally spray it with the plastic little nozzle attached to the can and ensure all the gook in the passage way is clean, spray until no more junk comes out. Remove mass air flow sensor from TBI before doing this. You don't want to damage it. Spray the passage way from MAFS side also. While you have the TBI off, look at the port for EGR VALVE see if its clogged up with Carbon. Clean them out you can remove the carbon by scraping with a phillips head or bladed screwdriver. Two holes leading to the EGR Valve. They are about 1/2 inch in diameter round holes. Flush with the carb cleaner. If you really want to do ir right, remove the EGR Valve, clean it also and check to make sure its working. If NG replace it. Your EGR valve might be getting stuck due to carbon in the open position thus letting to much air into the intake manifold thus cunking out. Or the EGR has a leak. Check with vacuum pump by attaching VP to EGR. It should hold steady with 20 - 30 vacuum on the EGR. If it does not hold, throw it away and buy a new one.

You mentioned you replaced the MAFS. Remove it again and look in the element. Is it Wet or Dry?
It should be dry. Don't touch it. If its wet, then your air passages are clogged in the TBI. While you have the TBI out, spray all the vacuum fittings with the carb cleaner ensure they are free of blockage. Replace everything back carefully. Your truck should idle at 850 rpms if its standard and 700 if its auto. + or - 50 rpms. 850 is ideal. Let me know what happens after all of that.

Last but not least. Check the hose to the PCV Valve, ensure is not cracked, if damage, replace the hose and replace the PCV Valve. Ensure all vacuum hoses have no leaks and are correctly routed, especially the EGR valve one. From the manifold connect hose to center vacuum port or bottom port on the Solenoid Cut off Valve. Connect port B (Middle one to the EGR Valve.) Connect Port A (top one) to the Air Filter Canister. With the car on there should be continuity between port C and and B. You can check that with the vacuum pump. Gun the engine and see if you get a momentarily reading on the gauge if yes the port is good. If NO the Cut off Solenoid is NG. Find a working one in junk shop they are $100 bucks at the dealer. (highway robbery) If you are in PA go to Harry's U pull it. 5 bucks, each take the vacuum pump so you can check it before buying. The suffer from corrosion in the ports. Hope this solves your problem. Good Luck!

Aug 07, 2008 | 1988 Nissan Pathfinder

2 Answers

2004 ford f-150 idle air control


I intend to clean my iac, same symptoms and a good friend of the family who is a reputable mechanic says no need to replace jus clean out the carbon build up with some throttle body cleaner.

Jul 31, 2008 | 2004 Ford F150

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