Lasombra52

iTrader: (3)

I threw a code today. P1416. It says it is Air systems bank 2

No idea what that is? I changed the transmission filter, replaced the fluid. Changed oil and filter, replaced fluid, drained radiator, flushed it, repalced fluid with Dexron 3 like I was supposed to. In the middle of the running of the car, during the flush part is when I noticed the light come on. Any idea what this is? Let me know. Thanks.

1998 Chevrolet Camaro Z28, with 55,000 miles on it. Automatic A4.

Retsik

DTC P1416 Secondary Air Injection (AIR) System Bank 2

Circuit Description

This DTC refers to the passenger-side of the vehicle. A secondary air injection (AIR) pump is used on this vehicle in order to reduce the tail pipe emissions during start-up. The powertrain control module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump.

The PCM monitors the heated oxygen sensor (HO2S) voltages in order 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 monitors the 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.

If the PCM determines that the HO2S voltages for both banks did not respond as expected during the tests, DTC P0410 sets. If only one sensor responded, the PCM sets either a DTC P1415 for bank 1 or P1416 for bank 2 in order to indicate on which bank the AIR system is inoperative.

Conditions for Running the DTC

DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0131-P0135, P0137, P0138, P0140, P0141, P0151-P0155, P0171-P0175, P0200, P0300, P0325, P0327, P0332, P0335, P0336, P0351-P0358, P0430, P0500, P0502, P0503, P1133, P1134, P1153, and P1154 are not set.

The engine operates for more than 30 seconds.

The engine run time is more than 20 seconds after closed loop operation.

The engine speed is more than 850 RPM.

The maximum air flow is 22 g/s.

The ECT is between -10°C (14°F) and 110°C (255°F).

The IAT is between -10°C (14°F) and 100°C (212°F).

The ignition voltage is more than 11.7 volts.

The engine load is less than 40 percent.

The air fuel ratio is 13.125:1.

The engine is not operating in power enrichment mode OR in deceleration fuel cut-off mode.

The short term integrators are monitored while in fuel trim cells 1, 2, 5, or 20.

Conditions for Setting the DTC

When the AIR pump turns ON during closed loop operation, the HO2S voltage does not go below 222 mV for 0.9 seconds.

When the AIR pump turns ON during closed loop operation, the short-term fuel trim does not change more than a predetermined value.

Action Taken When the DTC Sets

The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTC

The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

A current DTC, Last Test Failed, clears when the diagnostic runs and passes.

A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.

Clear the MIL and the DTC with a scan tool.

Diagnostic Aids

An obstruction in the exhaust manifold may restrict the amount of air flow that is necessary to affect the HO2S voltage. If you suspect this condition, remove the air pipe from the manifold and inspect the passage.

For an intermittent condition, refer to Intermittent Conditions.

Test Description

The number below refers to the step number on the diagnostic table.

3) A check valve that flows in both directions causes heat damage to the AIR system components.

Step 1

Did you perform the Diagnostic System Check-Engine Controls?
--
Yes: Go to Step 2
No: Go to Diagnostic System Check - Engine Controls

Step 2

Important
Before proceeding with this diagnostic table, ensure that the AIR pump is operating and that air is present at the outlet of the AIR pump. If the AIR pump is inoperative, refer to DTC P0410 for further diagnosis.

1) Install a scan tool.
2) Idle the engine in Closed Loop.
3) Turn OFF all of the accessories.
4) Monitor the HO2S voltage display for the applicable bank on the scan tool.
5) Enable the AIR system using a scan tool.
6) Observe and record the HO2S voltage while the AIR system is enabled.

Does the HO2S voltage drop below the specified value?

Specified Value = 350 mV
--
Yes: Go to Diagnostic Aids
No: Go to Step 3

Step 3

Inspect all hoses and pipes for:

Proper connections

Secure clamps on the pipes and on the hoses

No kinks, holes, or pinched hoses or pipes

Components with evidence of heat damage

Did you locate the condition?
--
Yes: Go to Step 6
No: Go to Step 4

Step 4

1) Disconnect the hose from the applicable check valve at the exhaust manifold.
2) Enable the AIR system using a scan tool.

Is air present at the hose outlet?
--
Yes: Go to Step 7
No: Go to Step 5

Step 5

Repair the restriction or blockage in the applicable AIR hoses and pipes between the exhaust manifold and the point where the system branches to both sides of the engine.

Is the action complete?
--
Yes: Go to Step 8
--

Step 6

Repair the condition.

Is the action complete?
--
Yes: Go to Step 8
--

Step 7

Replace the applicable check valve. Refer to Secondary Air Injection (AIR) Check Valve/Pipe Replacement - Bank 1 or Secondary Air Injection (AIR) Check Valve/Pipe Replacement - Bank 2 .

Did you complete the replacement?
--
Yes: Go to Step 8
--

Step 8

1) Use the scan tool in order to clear the DTCs.
2) Turn OFF the ignition for 30 seconds.
3) Start the engine.
4) Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC run and pass?
--
Yes: Go to Step 9
No: Go to Step 2

Step 9

With a scan tool, observe the stored information, Capture Info.

Does the scan tool display any DTCs that you have not diagnosed?
--
Yes: Go to Diagnostic Trouble Code (DTC) List
No: System OK

DV8

iTrader: (6)

I just finished throwing this code also, and got 2 questions.

Is this system necessary for normal operation?
Will affect emisions testing?

Team ZR-1

Yes AIR is needed and Yes it would cause I/M 240 smog tests failures if not showing a complete state.

On cold start the temps are too cold for what O2s would see and assume AFR is too rich,
AIR is turned on for about 3 minutes, injects air into exhaust and thus O2s see a more truer AFR condition so in a way fools O2s and not over rich on Cats.

Once engine has heated up AIR pump shuts down and O2s are seeing real world AFR.

Smog tests are done when engine is hot so all they are looking at is what past PCM test results of AIR is and of course looking to see if the smog functions are still on the engine.

DV8

iTrader: (6)

Is this just a sensor that needs to be replaced or is it the entire AIR assembly?

Will having it removed by LS1 edit cause me to fail emisions testing or will the system look for just SES codes on the computer. MTI told me that some customers ask for this function to be removed when they do their LS1 Edit tuning. Thanks again for your help.

Team ZR-1

I would check the hose and the check valve for the right head. Valve is easy to replace.

Also check for a exhaust leak on that head.

I see no purpose of removing AIR for it helps PCM determine AFR from cold start.

If you had headers that had no AIR tubes or inlet fitting then you would need to turn off AIR.

biggie442w30

I have the same problem with getting a p1416 code. i cant find any leaks in the air system. you think if i just replace the check valve it will fix the problem????
My car has failed new york state inspection for the 1st time because of this.

2001NBMZ28

I'd replace the passenger side air check valve, not expensive and something you can do yourself. The valve is probably gummed up with carbon deposits.

robertc1221

I have 2002 Camaro Z28 with same error code: p1416. My extended warranty just ran out 508 miles ago! I can't find the passenger side air check valve for my car at any of my local auto parts stores. Any suggestions? And where is this valve located on my car?

2001NBMZ28

There's always the dealership, but they're getting expensive - about $40 now. GM PN is 12565503, maybe your local parts store can cross reference it. It's the black valve in between the metal air pipe coming off the header and clamps to the air hose near the #4 cyl coil pack.

michael dawson

p1416 error code on 2001 corvette i have it i took the driver side check valve off it works fine blow one way not the other.i took the air tube inlet loose on the passenger side off when i start the car with the driver side check valve conected to the hose not the manifold it blowes harder on the drivers side slightly. i put compressed air on the output side of the passenger side to check the check valve for the passenger side the check valve works. my question is how hard should the pump blow do i need a flow meter to check this. what else would cause this code,if the pump works and the check valves work.