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2001 Chevy Silverado DTCs P1404 and P1416

I am getting the following trouble codes P1404 and P1416 on my 2001 Chevy Silverado. Sometimes the check engine light goes out on its own. Other times it stays on for days. Where do I start.

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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

P1416 code on odm


This code sets when the air injection system is not
working on one bank (passenger side) of the engine. Since it is working
on the other bank, the problem is a bad air system check valve on the
passenger side. This check valve is located on the pipe feeding into
the passenger side exhaust manifold.

Feb 26, 2013 | 2001 Chevrolet Silverado 1500

1 Answer

Security code for 1997 Chevy Silverado 3500 6.5 diesel


First step is to check for error codes (DTCs) using a code reader and follow up if any.

Jul 03, 2017 | Chevrolet Silverado Cars & Trucks

1 Answer

P1416


P1416 Port Air Circuit Malfunction/ (AIR) System Bank 2 bank 2 is the passenger side of the engine, and the AIR system usually has something to do with the exhaust. Look for broken hoses, vacuum lines, leaking gaskets, anything that could cause air to escape. Check your vacuum lines carefully by using a propane UNLIT propane torch and go around every single vacuum line with the engine running. If the engine rpms increases, you have found the leak. If you find nothing amiss, take it to a professional and do not just throw parts at the problem. You will be money ahead.


Sep 10, 2011 | 2001 Chevrolet Silverado 1500

1 Answer

I have a 2000 pontiac with a 3.8 not supercharged that has a code P1404 auxilary emission control what is this and how can I find it on my car to replace.


I am assuming that hte solution for a 3.8 is the same as for a 3.4L, but I'm not certain about that.

Trouble Code: P1404 (3.4L V6 VIN E Std)
Exhaust Gas Recirculation (EGR) Closed Position Performance Print this code dataprint_icon_codes.gif

Number of Trips to Set Code: 2

OBD II Monitor Type: CCM Details
Indicators: MIL Details

Trouble Code Conditions:

  • TP, VSS, Misfire, IAT, MAP, Idle Speed, Fuel Injector, ECT, CKP, or MAF Sensor DTCs are not set.
  • System voltage is between 9.0-18.0 volts.

Possible Causes:

  • Loose terminal connection
    • Use a corresponding mating terminal to test for proper tension. Refer to Testing for Intermittent Conditions and Poor Connections , and to Connector Repairs in Wiring Systems for diagnosis and repair.
    • Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connection. Refer to Testing for Intermittent Conditions and Poor Connections , and to Connector Repairs in Wiring Systems for diagnosis and repair.

Oct 21, 2010 | 1999 Pontiac Grand Am GT

2 Answers

On a chevy silverado what does diagnostic code p1404 mean?


you can find the answere at the following link....hope this helps...http://www.bba-reman.com/content.aspx?content=DTC_P1404_CLOSED

Apr 18, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

Chevy Impala 2001 w/ 3.8L engine - EGR stuck open


there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.

Nov 28, 2009 | 2000 Chevrolet Impala

1 Answer

1998 Chevy Truck 1/2 ton 350 engine. Trouble codes P0404, P0405 and P1404. I replaced the EGR valve. Now I get t/c P0404 and P0405. Now what should I check?


404 is exhaust gas recirculation circuit, and 405 is exhaust gas recirculation sensor circuit low. EGR sensor or ground?

Nov 13, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

I replaced my egr valve on my 2001 chevy venture 1 1/2 yrs ago,


I found an answer that worked for me here. (I have a 2001 Chevy Venture.) http://www.fixya.com/cars/t4093012-code_p1404_dodge_ram_1500_meanIn case links are not allowed, here's the text:That code is the EGR. I'd start by checking for a bad connection on the EGR plug-in. Pull the connector off and inspect each individual terminal inside the plug and the connector pins inside the EGR valve.
I found this solution at another forum on this issue. It worked on my 2001 Grand Am:

"Many GM built cars have a tendency to have the 'Check Engine Soon' light come on as a result of DTC code P1404. P1404 is described as EGR valve pintle stuck open, which in most cases is a false alarm. I had this happen with my '01 Grand Am. A little bit surfing on internet reveals that GM has a solution for the problem, a re-flash for the car's computer.

A software re-flash as a fix kind of indicates that the vehicles with this problem were built with it but I don't think GM will be re-flashing cars outside warranty for free. They will want their $100 for it.

Some hands on people I found had purchased a new EGR valve and changed it but the problem remained.

Possible reason (very likely) for the false P1404 code is that the plastic piston of the EGR valve position instrument (LVDT?) wears over time and starts reading a different position at valve closed than what it was when the EGR valve was first installed.

When the car was built and the computer circuits energized for the first time the computer learned the EGR valve closed position signal from the valve position instrument that is built on top of the valve itself. Over time, when the instrument wears, a slightly different signal is sent to the computer and when it differs enough from the 'Valve Closed Signal', that the computer had learned, the trouble code P1404 is set and the 'Service Engine Soon' light comes on.

Replacing the EGR valve with a new one does not necessarily fix this problem because the 'Valve Closed Signal' between valves is slightly different and it is just pure luck if your new valve would give a 'Valve Closed Signal' close enough to your original valve's signal not to set the trouble code. This is why the new EGR valve 'Valve Closed Signal' must be re-learned by the computer.

So, what this all means is that if the P1404 is a false code meaning that the valve pintle is not stuck open, then new 'Valve Closed Signal' can be re-learned by the computer using the old valve.

For fixing this problem the tool you need to have is a simple OBD II code scanner that can be used to erase trouble codes. There are many scanners of different price range on the market. I purchased one from AutoZone for about $90.

A code scanner is a very handy tool to have and I recommend everybody who is just slightly hands on type of a person to get one. It will end up saving a lot of money over time.

The fix goes like this:

1. Disconnect the wire harness from the EGR valve.

2. Turn key ON and erase the trouble code(s) from the car's computer AND TURN KEY OFF IMMEDIATELY WHEN THE SCANNER SAYS CODES HAVE BEEN ERASED. DO NOT TURN KEY ON BEFORE YOU RE-CONNECT EGR WIRE HARNESS.

3. Re-connect EGR wire harness and your problem should be fixed.

Mar 27, 2009 | 2001 Chevrolet Venture

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