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Secondary air injection pump motor continues to run when engine is shut off. approximately 15 seconds on 30 sec off.

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Is the secondary air injection system nessary for good engine performance or is it's function only to dilute burn exhaust emissions?


It's only used on cold start to help the Catalytic converter light off . The check engine light will be on all the time if you disconnect it .
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 powertrain control module (PCM) 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.

Apr 30, 2017 | Cars & Trucks

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

How do you bleed a diesel pump jeep Cherokee turbo diesel 3.1 5 cylinder 2001


we dont have this engine here, USA.
but i have the WG jeep book,
starting page 12 , chapter 14


FUEL INJECTION PUMP BLEEDING
(1) If the fuel injection pump has been replaced,
air should be bled at the overflow valve before
attempting to start engine.
(a) Loosen the overflow valve (Fig. 18) at the
rear of the injection pump.
(b) Place a towel below the valve.
WARNING: WHEN CRANKING THE ENGINE TO
BLEED AIR FROM THE INJECTION PUMP, THE
ENGINE MAY START. PLACE THE TRANSMISSION
IN NEUTRAL OR PARK AND SET PARKING BRAKE
BEFORE ENGAGING THE STARTER MOTOR.
CAUTION: Do not engage the starter motor for
more than 30 seconds at a time. Allow 2 minutes
between cranking intervals.
(2) Crank the engine for 30 seconds at a time to
allow air trapped in the injection pump to vent out
the fuel injector drain tubes. Continue this procedure
until the engine starts. Observe the previous WARNING
and CAUTION.
(3) Tighten overflow valve.
HIGH-PRESSURE FUEL LINE BLEEDING
WARNING: THE INJECTION PUMP SUPPLIES HIGH-
-PRESSURE FUEL OF APPROXIMATELY 45,000 KPA
(6,526 PSI) TO EACH INDIVIDUAL INJECTOR
THROUGH THE HIGH-PRESSURE LINES. FUEL
UNDER THIS AMOUNT OF PRESSURE CAN PENETRATE
THE SKIN AND CAUSE PERSONAL INJURY.
WEAR SAFETY GOGGLES AND ADEQUATE PROTECTIVE
CLOTHING AND AVOID CONTACT WITH
FUEL SPRAY WHEN BLEEDING HIGH-PRESSURE
FUEL LINES.
WARNING: DO NOT BLEED AIR FROM THE FUEL
SYSTEM OF A HOT ENGINE. DO NOT ALLOW FUEL
TO SPRAY ONTO THE EXHAUST MANIFOLD WHEN
BLEEDING AIR FROM THE FUEL SYSTEM.
Bleed air from one injector at time.
(1) Loosen the high-pressure fuel line fitting at
the injector (Fig. 19).
(2) Crank the engine until all air has been bled
from the line. Do not operate the starter motor
for longer than 30 seconds. Wait 2 minutes
between cranking intervals.
(3) Start the engine and bleed one injector at a
time until the engine runs smoothly.

end quote.
pump timing is on next page
or tank filter line priming before. above.

Mar 22, 2016 | Jeep Cars & Trucks

1 Answer

What does it means p2258 code for 2003 Ford Focus , Smog test Failed


P2258 Secondary Air Injection System Control A Circuit High

http://www.motorcraftservice.com/vdi...f/OBDSM505.pdf

Secondary air systems typically utilize an electric air pump as well as one or two electrically controlled check valves to deliver air into the exhaust manifold.

The only vehicle which uses secondary air is the 2.3L PZEV Focus. The Focus uses a system with ported air. This means that airflow is delivered to each individual exhaust port. The secondary air pump is energized soon after start-up while the fuel system is in open loop and icing conditions are not likely. After the O2 sensors warm up, the secondary air pump continues to be energized while the fuel system goes into closed loop fuel. The secondary air system continues to run in closed loop fuel until the air pump is de-energized. The typical time period in which the AIR pump is energized is approximately 12 seconds.

The AIR pump flow check monitors the HO2S signal at idle to determine if secondary air is being delivered into the exhaust system. The air/fuel ratio is commanded open-loop rich, the AIR pump is turned on and the time required for the HO2S signal to go lean is monitored. If the HO2S signal does not go lean within the allowable time limit, a low/no flow malfunction is indicated. (P0411)

The electric air pump draws high current and must be energized through a separate relay. Both the primary and secondary circuits are checked for opens and shorts. First, the output driver within the PCM (primary circuit) is checked for circuit continuity (P0412). This circuit energizes the relay and the vacuum-operated check and control valve(s). Next, a feedback circuit from the secondary side of the relay to the PCM is used to check secondary circuit continuity (P2257, P2258).

Nov 22, 2013 | Cars & Trucks

1 Answer

Noise when drivivng


If its only when the engine is cold its the secondary air injection pump. It pushes air directly in the exhaust manifold to lower emissions. It should shut off after 30 seconds or so




Mustang Parts.


May 28, 2012 | 2003 Chevrolet TrailBlazer

2 Answers

Car is choking out and dying. Reads P 0411 code. How do I know if its the motor or just the solenoid valve? How can I check to narrow down what actually is causing the problem? It's on a 2000 VW jetta VR6


16795/P0411/001041


if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 16795/P0411/001041 - Secondary Air Injection System: Incorrect Flow Detected Possible Symptoms
  • Malfunction Indicator Light (MIL) ON
Possible Causes
  • Fuel Pump Relay (J17) faulty
  • Hoses/Pipes to/between Components faulty/clogged
  • Secondary Air Injection Pump (V101) faulty
  • Secondary Air Injection Pump Relay (J299) faulty
  • Secondary Air Injection Solenoid Valve (N112) faulty
Possible Solutions
  • Check Fuel Pump Relay (J17)
  • Check Hoses/Pipes to/between Components
    • Check Secondary Air Injection Hoses/Pipes for Carbonization
  • Check Secondary Air Injection Pump (V101)
  • Check Secondary Air Injection Pump Relay (J299)
  • Check Secondary Air Injection Solenoid Valve (N112)

Apr 28, 2010 | 2000 Volkswagen Jetta TDI

2 Answers

P0410


99-01 Blazers with the 4.3L motor and 00-03 2.2L motors have the Secondary Air Injection system and I've listed the codes, part #s, circuit description, and have to fix below.

DTC P0410 (SES Light On) - Secondary Air Injection
P1415 and/or P1416 for secondary air injection Bank A and B can also be set if the powertrain control module (PCM) detects a heated oxygen sensor voltage mismatch and activates an internal test to confirm.

Circuit Description:
This is located under the radiator (pump, electric solenoid, and vacuum shutoff valve) and tees off up to the exhaust manifolds thru 2 check valves on 4.3L. For 4wd remove the front skid plate to access. The secondary air injection pump is used to lower tail pipe emissions on start-up. The PCM supplies a ground to the pump relay, which energizes the pump and the electric solenoid valve. Engine vacuum is applied to the shut-off valve when the solenoid is energized. The engine vacuum opens the shut-off valve that allows air to flow to the exhaust manifolds. Often the pump gets water/moisture in it and freezes up blowing the fuse and the check valves rust or freeze open internally and then burn threw the rubber hose, and even melt the lower “T”, shutoff, and even pump impeller.

Check/Replace as required:
1. You should hear the pump on starting the Blazer and if you put your hand on it you will feel it running for about 1 minute. Part #12560095 (AC Delco 215-364) Pump, Sec Air Inj for 1999-2000 L35 (4.3L) or #12568324 (AC Delco 215-425) Pump, Sec Air Inj for 2001 L35 (4.3L) + 2000-2003 L43/LN2 (2.2L).
The GM # is on your current pump so check it because the Dealer is very confused and/or out of these and will sub other pumps. You can remove the pump and take the #25 torx screws out and see if the impeller is clogged, rusted, melted, etc before spending $100-200 for it. Impeller should spin freely.

2. Extend the air intake hose that ends halfway up the passenger side of the radiator about 2 more feet so it can run between the battery and coolant reservoir and push into the fender hole to keep dry. 99-00 is 5/8 heater hose and inline connector and 01-03 is 3/4 heater hose and inline connector –check size.

3. #12558992 (AC Delco 215-638) air injection check valves 2 required – most stores sell these for $12-20 each or Dealer $33 each. If they rattle or the hoses are burned threw replace – should only flow air into the exhaust. The easiest way is to remove the two 13mm nuts that mount the check valve pipe to the exhaust manifold and use a vise to hold them – trust me here. The little exhaust gaskets should be reusable.

4. #10217106 connect (hoses) 2 required check valves to pipes (Dealer Only $7 each). If burned threw or hard/brittle replace. Usually a good thing to plan on buying!

5. #12555165 secondary injection shutoff valve (vacuum operated in the ¾” hose in the pump outlet to the “T” pipe under the Blazer (Dealer Only $27). Only open when the pump is on and vac applied. Also replace the 5/32” vac hose from the solenoid to valve and solenoid to intake (about 4 ft of it). Once you extend the air intake listen to the hose end and you should not hear any exhaust noise after the short initial one minute pump run – if you still do the vac diaphragm is stuck open/clogged/burned so replace. Vac is applied by an electric solenoid mounted by the pump #01997264. The center vac port goes to the intake Manifold vac and the off center vac goes to the shutoff valve above. The vac should only be applied to the shutoff valve for that 1 minute as the Blazer starts then is switched off. Hose clamps will be needed here.

6. #10105352 “T” for under Blazer where pump outlet to both pipes connect – if yours melted! One end is ¾” and two are 5/8”ends - but you can use a ¾” on all ends with a little lube. Hose clamps here too.

7. The pumps 30 amps Maxi-fuse (large size) is under a little black cover between your battery tray and inside the passenger side fender. You may have to remove your battery to get to it. Depress the little cover retainer and remove, then pull the large fuse out to check/replace. There’s also a 10 amp small fuse to check for the electric solenoid that controls the secondary injection shutoff valve mounted by the air pump.

8. If you need the 2 lower hoses that connect the metal pipes to the “T” going to the pump here’s the bad news – Dealer Only and includes the pipes so over $100.

Good luck and thank you for using Fixya.

Mar 07, 2010 | 2000 Chevrolet Blazer

2 Answers

Hello i have a 2000 AUDI A-6 2.7T the engine light is on had it checked it is a p1411 code can I fix it myself


Code is - Secondary air injection system, bank 2 flow too low.

Check fuse for sec. air injection pump.
Check vacuum hoses
Check piping from pump to sec. air injection valve. (combi. valve)

Sep 18, 2009 | 2000 Audi A6

2 Answers

I have a 2001 gmc jimmy wiTh a secondary air injection code. bought THE VEHICLE used and had the code checked in the summer because it is hard to start it turns over,i replaced the fuel pump relay i also...


this is most certainly the electric motor driven secondary air injection pump, very prone to failure.
Price at www.rockauto.com $207.00 (lowest anywhere)
AC DELCO Part # 219505 {#17803251}
PUMP,SECD AIR Injection w/ELEC AIR INJECTION REACTOR(K18)

Feb 13, 2009 | 2001 GMC Jimmy

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.
2000 Volkswagen Passat GLS
2000 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

Jun 21, 2008 | 2000 Volkswagen Passat 4Motion

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