Question about 1999 Chevrolet Tahoe

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How should the air pump in my secondary air injection system in my 99 chevy tahoe 5.7L 4x4 run ? Should it always be pumping air in or should it only run for the first few minutes whenever the motor

I have the trouble code p1416 on my 1999 Chevy 5.7L 350 which is the secondary air injection system, (bank 2) (valt 2) from multiple diagnosis machines. I have replaced both of the check valves, which were both bad. I then went threw the entire system and cleaned all tubes involved metal and rubber and all parts involved in the system are in proper working function yet even after doing a reset on the cars system the code still comes on. The only part I am not sure about is the pump. Whenever I turn the vehicle on it turns on and sucks air in and pumps it through the system then its stops pumping after about a minute or two. Is that how the pump is supposed to run or should it always be pumping when the vehicle is running? If that is how it is supposed to run then what else could my problem be? Could it possibly be an O2 sensor or a fuel injection issue? Any thing that anyone could tell me would be very much appreciated, thank you.

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  • Chevrolet Master
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It runs only when the engine is below a present coolant temperature, it never runs after that. The purpose is to burn off excess hydrocarbons.

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

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SOURCE: 1997 chevy silverado 1500 350 vortech, new fule pump not working

before you drop tank again, check fuses & relay.then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. if no flow from line new pump faulty be sure & remove negative battery cable first good luck.

Posted on Jun 20, 2009

Molson02536
  • 3854 Answers

SOURCE: 2004 trailblazer,with po410 code.replaced purge

p0410 secondary air injection valve malfunction..
Just know that diagnosing this is time consuming since the "system" is only active for a few seconds on cold start.

for now:
1.) wait for your car to be "cold" or 4 hours. Disconnect the hose from check valve (located passenger side--the transmission dip stick is attached to the bolts that hold it to the block). Start the truck, you should hear a nasty sound for about 30 seconds to a minute. If you don't its your check valve.
1a.) If it is your check valve, you can try to clean it. Get some throttle body cleaner, remove the check valve spray thouroughly (I did it a couple of times to get all the carbon and rust out) and let dry reinstall and follow above instructions. If no go replace check valve

2.) wait for your car to be "cold" or 4 hours. remove the fattest hose from the underside of air intake hose (I think thats where it is, I have a CAI so Its hard to know where it is exactly OEM) and from the check valve. Have someone else start the truck. Feel the hoses, you should feel sucking and blowing (I can't remember which is supposed to blow / ****) If you don't feel anything then its the pump (maybe -- read further)
2a.) check fuses there are about 3 in the manual listed for air pump (if bad fuse replace and retest, make sure to check the fuses after to make sure that the pump isnt blowing fuses) 
2b.) Locate the air pump its driver side mid car just behind the cross member for the frame. There are two wiring harnesess one that goes into the relay (grey box) and one that has two fat wires (thats the power plug for the pump.) disconnect that one, wait for cold start and start truck while having a multimeter attached set on DC mode. If you get a reading of 0 then replace the relay. if you get power 12-15 volts replace the motor. 
3.) If both the check valve and the pump are testing out ok it could be a clogged hose.

There are only 3 parts to this system, Check Valve ($125), Air Pump ($280) and Relay ($50). parts4chevys.com has it listed as a check valve. $128 list. Good luck and hope this helps

Posted on Apr 08, 2009

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SOURCE: I need a diagram for 1998 chevy tahoe fuel pump

Do you want a diagram, or do you just want to replace the pump?

Posted on Dec 17, 2008

  • 2 Answers

SOURCE: 2001 chevy blazer won't start

have you tried cleaning your fuel injectors? There is a cleaner that you put into the vaccum line that comes from the brake booster to the intake (so it feeds all the injectors all at once) it is called SeaFoam it runs about $8.50 a can. The directions are on the can.

Posted on Dec 11, 2008

  • 140 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Posted on Jan 03, 2009

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2 Answers

2008 trail blazer 4.2 4x4 fan under the hood runs all the time. Why how to fix?


What fan ? Your vehicle doesn't electric cooling fans , has engine cooling fan and clutch driven by the crankshaft via the drive belt. Your probably taking about the
Secondary Air Injection System Description .
The secondary air injection (AIR) system aids in the reduction of hydrocarbon exhaust emissions during a cold start-up. This occurs when the start-up engine coolant temperature (ECT) is between 5-50?°C (41-122?°F), and the intake air temperature (IAT) is between 5-60?°C (41-140?°F). The AIR pump operates 5-60 seconds after start-up.
The engine control module (ECM) activates the AIR system by simultaneously supplying grounds to the AIR pump and the AIR valve relays. This action closes the relays' internal contacts. The AIR pump and the AIR control solenoid valve/pressure sensor assembly are in turn energized, the pump runs and the control/shut-off valve opens.
The AIR pump sends pressurized fresh air into the pipes/hoses through the open control/shut-off valve, and into the exhaust manifold. The extra air accelerates the catalyst operation, helping it to reach operating temperature faster. The AIR pump remains ON for a short period of time after the control/shut-off valve is commanded OFF. When the AIR pump is commanded OFF it will not run or be activated until the next vehicle start. When the AIR system is inactive, the closed AIR control/shut-off valve prevents air/exhaust flow in either direction.
In the under hood fuse box find AIR PUMP fuse # 64 60amp pull the fuse an see if the fan goes off . There are two relays secondary Air injection (AIR ) pump relay . The contacts may be stuck together .
In the under

Oct 05, 2016 | 2008 Chevrolet Trailblazer

1 Answer

Where can I find the fuse and relay for air injector pump on a 2005 chevy trailblazer LS?


AIR SOL - fuse #54 15amp - AIR fuse #56 60amp location under hood fuse / relay box
54
AIR SOL Fuse
15A
AIR SOL Relay, Secondary Air Injection (AIR) Pump Relay, Secondary Air Injection (AIR) Pump, Secondary Air Injection (AIR) Solenoid
55
AIR SOL Relay
--
Secondary Air Injection (AIR) Solenoid

Sep 13, 2016 | 2005 Chevrolet TrailBlazer LS

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

Code p0410


that code is for the secondary air injection pump that feeds air into the exhaust at startup. it's usually a bad electrical connection or the pump has gone out in some way, this isn't for the tahoe exactly (i have a 99 myself) but the principalc are the same. watch this guy's video i haven't posted anything about this on my daddytechent channel on youtube yet
http://www.youtube.com/watch?v=dIrmkxj6wJE

Feb 22, 2013 | 2001 Chevrolet Tahoe

1 Answer

1. Trouble Code #00410 "States Secondary Air Injection System". What is the "Secondary Air Injection System"? This is not to be found in the Hanes repair book. 2. What is the "rear bumper towing...


I have a 2000 2.2L Sonoma that I had to replace the motor in with a 99 engine and when I did the exhaust manifold was different and I could not hook up my air pump and I now have a service engine light on all the time but it runs just fine and I even think it improved my gas mileage. You might check your air pump connections or sensor. The air pump is on the front of the engine below the ac unit. I TOO have a Hanes book but also a Chilton book because 1 covers some things the other does not

Sep 10, 2010 | 1999 GMC Jimmy

1 Answer

I have a 05 chevy trailblazer, the check engine lite is on and a hand held analyzer indicated problem codes: PO410 $ PO128 any ideas? Wayne C


P0410

Definition
Secondary Air Injection System fault
Explanation
The air injection system is monitored for faults
Probable Causes
1) Circuit relay defective or fuse open
2) Check connector and wiring
3) AIR pump defective or hoses blocked


P0128
Fault Code Definition
  • Engine temperature has not increased and/or reached the correct level within a specified amount of time after engine startup
Common Problems That Trigger the P0128 Code
As for the po128 I would replace the thermostat first. That is the problem 99% of the time.

Good Luck

Jul 12, 2010 | Chevrolet Chevy Cars & Trucks

2 Answers

Obd code of p0411 on a 1999 ford mustang 3.8 v-6 what do I check to correct


That's s failure of the secondary air pump. It'll have to be changed. It's an emissions component meant to help with cold start emissions. It won't cause engine running trouble but at inspection time you'll fail for smog. Change it before then and you'll be fine.

May 16, 2010 | 1999 Ford Mustang Cobra

3 Answers

1998 Chevy tahoe Hard to start when cold


replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Feb 17, 2009 | 1999 Chevrolet C/K 2500

1 Answer

Vw passat 2000 1.8t front wheel drive


please rate me solved...thanks

DTC P0411/16795: SECONDARY AIR SYSTEM - INCORRECT FLOW DETECTED
Test Requirements
Ensure all fuses are okay, battery voltage is at least 11.5 volts, all electrical accessories are off, A/C is off.
Ensure engine is mechanically sound.
Test Procedure

NOTE
Secondary air system is activated by ECM and blows air into exhaust pipe
upstream of catalytic converter for 100 seconds during a cold start, 41-91°F (5-
33°C). Engine must be cold to perform following test procedure.

1. Ensure fuse and secondary fuse (secondary fuse is 40 amp and is located in fuse holder on top of battery)
are okay. Check hoses and components of Secondary Air Injection System, for damage, loose fit and
improper installation, check vacuum hoses for Secondary Air Injection System. Repair as necessary.
Erase DTC memory. Verify repair. If DTC does not reset, test is complete. Perform ECM relearn
procedure. See TEST DRIVE RELEARN PROCEDURE .
2. Remove engine cover. Disconnect pressure hose from Secondary Air Pump Motor (V101), by pressing
buttons on hose connector. See Fig. 33 . Using scan tool, check Secondary Air Pump Motor (V101) in
scan tool Output Diagnostic Test Mode (Secondary Air Pump Relay activation mode). See OUTPUT
DIAGNOSTIC TEST MODE .
3. Secondary Air Pump Motor (V101) should run in intervals and air should exit pump at hose connection.
If Secondary Air Pump Motor (V101) is okay, go to step 7 . If motor runs and no air exits secondary air
pump motor, replace faulty Secondary Air Pump Motor (V101). Erase DTC memory. Verify repair. Test
is complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE . If
secondary air pump motor does not run, go to next step.
4. Disconnect Secondary Air Pump Motor (V101) harness connector, install LED test light at secondary air
pump harness connector terminals. Turn ignition on. Using scan tool, activate Secondary Air Pump Motor
(V101) in scan tool Output Diagnostic Test Mode (Secondary Air Pump Relay activation mode). See
OUTPUT DIAGNOSTIC TEST MODE . LED test light at Secondary Air Pump Motor (V101) harness
connector should flash. If LED test light at Secondary Air Pump Motor (V101) harness connector does
not flash, go to next step. If LED test light at Secondary Air Pump Motor (V101) harness connector
flashes, replace faulty Secondary Air Pump Motor (V101). Erase DTC memory. Verify repair. Test is
complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .
5. Using DVOM check resistance of Secondary Air Pump Motor (V101) wiring. See appropriate WIRING
DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. Resistance should
be a maximum of 1.5 ohms for each reading. Check wiring for short circuit to one another in Secondary
Air Pump Motor (N101) harness connector. Repair as necessary. Erase DTC memory. Verify repair. Test
is complete. Perform ECM relearn procedure.
Secondary Air Pump Motor (N101) wiring is okay, go to next step.
6. Check Secondary Air Pump Relay (J299) and Secondary Air Pump Relay (J299) wiring. See DTC
P0418/16802: SECONDARY AIR PUMP RELAY (J299), MALFUNCTION . Repair or replace as
necessary. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See
TEST DRIVE RELEARN PROCEDURE .
7. Disconnect vacuum hose from Secondary Air Injection Valve (N112) and disconnect pressure hose from
secondary air pump motor, press buttons on pressure hose connector to disconnect pressure hose. See Fig.
34 . Blow lightly into disconnected pressure hose, Combi-Valve should be closed. Connect hand vacuum
pump to disconnected vacuum hose and apply vacuum to Combi-Valve, Combi-Valve should open. If
Combi-Valve opens when vacuum is applied, Combi-Valve is okay. Go to next step. If Combi-Valve
does not open when vacuum is applied, replace faulty Combi-Valve. Erase DTC memory. Verify repair.
Test is complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .
8. Check Secondary Air Injection Valve (N112). See DTC P0412/16796: SECONDARY AIR
INJECTION VALVE (N112), ELECTRICAL CIRCUIT MALFUNCTION . Repair as necessary.
Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure.
NOTE: Do not use compressed air to check Combi-Valve.
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