Have gotten code P1416 three times in the past 200 miles. Bank 2???

Exatly what is it, and what do I need to do other than reset the computer??

Thanks in advance

 

DTC 1416 means that when the PCM activates the AIR pump it expects to see the o2 sensor voltage dive to <222mv if it does not then the DTC sets. This only happens after the engine is in closed loop control. Apparently this is only on bank 2 which is the passenger side. If I were you I would begin checking the problem by making sure that the AIR pump hose connections to the check valves going to the right bank are connected, and make sure that the tube is connected between the right exhaust manifold up to the check valve that is located behind the intake manifold near the drivers side valve cover at the firewall.

 

Benny,

Sounds like the checkvalve on the AIR line

CHarlie

 

I check the lines from where they run up from the headers to the check valve to behind the intake, to me they look fine.

 

It's bad.. replace it this is a high fail part on our cars..

 

Another easy thing to check (particularly if it is happening like clockwork every second cold start), is fuse #50 in the engine compartment fuse box.

-Bob

 

I take it you are talking about the check valve.
I will check the fuse first then go from there. Thankd for the info/help.
Benny

 

Here's the PN for the check valve--22040805
It's only about a $25 part.

 

Yes, sorry bout that.. You can also get 'em from Napa for $12.99 I believe..

 

Thanks for the input. I will get after it this weekend. I have to run a friend up to A & A sat to pick his new "Maggie" ride. I will get it done after that.

 

It most likely is not the checkvalve it is due to the mods, headers and tune.
AIR test is NOT done in closed loop, its done within the 1st two minutes of cold start for that is when the AIR is supposed to be on.
If check valve or as suggested was bad or open hose the engine would be running like crap since that side of the engine would be reporting a different AFR and the PCM would be reacting to it.

Suprising claimed tuners telling you its a hose or leak when you do not state any other problem other then AIR code.

What does happen is on cold start is PCM commands AIR on to inject air into exhaust to speed up the CATS to get hot and fire off.
PCM expects BOTH front O2s to instantly report leaner since the air being injected into exhaust.

On startup the PCM does a compare of front and rear O2s, it uses rears then because the temp is more stable and cleaner after the CATS and from that judges what the average injector pulse width will be.
If hacked the rear O2s or no O2s then a better chance PCM during the compare on cold start thinks that side is too rich so AIR is at fault but that was a stock engine would do and not expected what mods would effect those AIR tests.

What can happen is with long tube headers with lousy design the front O2s are located further downstream so the exhaust temp is colder, the O2 wires may have been spliced or some wire coupler used causing the outside air reference being ruined
Larger injectors used and tuned incorrectly even with AIR on still maybe too rich on cold start and O2s then not reporting lean enough to pass AIR tests.

If headers have AIR tubes it is common they could have cracked welds which would cause AIE test failure for that head.

Check valve is very simple in design so before spending money on a new one is take it off, clean it and test it for air would only be allowed to enter exhaust and no exhaust flowing back to AIR pump which would kill it so if it was a bad valve the pump also would be effected and trip AIR pump or relay failures
With OBD scanner see if the I/M smog tests for AIR are in a complete or non complete state

 

Actually it does not throw the code shortly after starting. It is usually 10 to 15 miles down the road after the engine is at full operating tempt.

The headers are new American Racing headers. I checked around the welds and did not see any carbon or other sighns of air leakage.

 

I also just recently started experiencing P1416 faults, under the same conditions as RamonaC5. The check engine light only comes on after I have driven 10 - 12 miles (typically right when I am pulling into work). I have no mods on the car. Has anyone had any further success or insight?

 

Here are the conditions running the air test. Look at the condition, third from last...you must be at operating temperature for it to run the test. If you don't have long tubes and your O2s read fine normally then the most likely suspect is the check valve in the AIR system.

Conditions for Running the DTC
• DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, P1441 and HO2S DTCs are not set.
• The engine is running for greater than 2.0 seconds.
• The maximum air flow is 22 g/s.
• The Air Fuel ratio is 14.7:1
• The engine load is less than 40 percent.
• The ignition voltage is greater than 11.7 volts.
• Engine is not operating in Power Enrichment, Decel Fuel Shut-off, or Catalyst Over-temperature Modes.
• The engine speed is greater than 600 RPM.
• The ECT is greater than 80°C (176°F) but less than 110°C (230°F).
• The IAT is greater than -10°C (-14°F).
• The fuel system is operating in fuel trim cells 1, 2, 4, 5, or 6


Conditions for Setting the DTC
The HO2S voltage does not go below 222 mV for 1.2 seconds.
OR
The short term fuel trim does not change more than a predetermined value.

 

I just experienced the same code; in fact I posted the same question. Let us know what you find. I am starting to think it’s due to the rich condition of these H/C cars at start up.

 

a scan tool like snapon is needed ya can command the pump to run and these things are like mini leaf blowers,they move a good volume of air. check the SOURCE . the pumps intake go to air cleaner. one check valve is easy to change the other ya may have to pull intake. but the good news is mine did it when i went kn filter maybe 6 times i checked every thing including carboned up tubes [like my car has any carbon deposits with the way i drive]never happened again now at 116 k

 

So you never found a problem? It just went away? I would think that if it were the source both banks would report a code. Unfortunately this code is the passenger side and the intake has to be removed to change the valve.

 

CORRECT!!!! Another superior design by the Vette gang at GM I have the same problem on my 01 Z06 with 20k miles... I get it once a week, and manually clear it from the DIC every time... If I could get my Acura TL to accelerate like my Z06, the Z would be history!!!

 

Since the last DIC reset in October, the problem has not reoccurred. Seems to have fixed itself. Amazing a Vette that fixes it's own problem.
Thanks for the info and input.

Benny

 

Hey guys,
My engine check light came on today after a 3rd gear pull, so I ran a DIC diagnostic and got this same code P1416 H C. I just got the car about 2 weeks ago and it has 30K miles on it. Any ideas on how to fix this problem?