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What does the codes PO410 & P1416 mean? Can one be fixed with out the other? PLease advise..Thanks Doug

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05 Chrysler 300c 5.7 with codes P1416 and P2784- where do I start first? what other things sind I look out for? Any Suggestions? Please Help! Thank you....


its a diesel engine right
is it turbo-ed

very complicated engines with all the electronics
best guess....could be very wrong
suggests cylinder 6 is down on intake pressure
and Input/Turbine speed sensor might be that cause of that


thats the two issues .
.might need a Chrysler service division to sort out

P1416 .Cylinder 6 Reactivation Control Performance
P2784.....generic code only
Input/Turbine Speed Sensor "A"/"B" Correlation



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Oct 14, 2016 | Chrysler Cars & Trucks

1 Answer

What would your first step be if a 2005 chevy trailblazer has three codes po128 po410 po014


Google your codes & read up

Type: OBD & your codes

The way you work on any vehicle ,is to have factory service
manuals with trouble charts to follow

You need a professional scan tool, almost always ,to get not
just Generic but Enhanced codes

You have to road test to gather & look a all Data

You have to review the data & come up with your component
testing strategy, just to find a problem,anything,correct it &
continue on

Aug 10, 2014 | 2005 Chevrolet TrailBlazer

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

2 Answers

I have a 00 cadillac deville base. i have a po410 check engine code. i was wondering what is the usually fix for this


Code po410 secondary air ignition malfunction

Start up your car cold, if you don't hear a sound like a vacuum cleaner running under your car you probably need a new air pump.
First, check the maxi-fuse in the underhood fuse block for the AIR pump.
If it's blown then you need to get under the car on the driver's side.
Remove the front cover and look at the bottom cover on the air pump, if it's dislodged and full of water the pump probably sucked up some water and is no longer good. There is a bulletin out to replace the air pump and the intake duct with a redesigned part that is not so suceptible to water intrusion. Also it's possible that the connector is burnt up, I have seen some with new air pumps set codes because of a fried electrical connection.thank you and have a wonderful day

Aug 22, 2011 | 2000 Cadillac DeVille

1 Answer

I have 3 codes on my 2001 saturn SL2. PO301, PO410, PO442. What do these mean? Is the car worth repairing? Will it pass a vehicle emissions test?


PO 301 is no 1 cylinder misfire, PO 410 is secondary air injection system, & PO 442 is Medium leak detected in EVAP system.

Feb 14, 2011 | 2001 Saturn S-Series

2 Answers

Code 1416 bank 2 2000 gmc jimmy


P1416 - Secondary Air Injection (AIR) system Bank 2
1416 means that you are running lean while the smog pump is on.
It could also be likely the vacswitch on the smog pump is the causes.

Jan 31, 2010 | 2000 GMC Jimmy

1 Answer

Check engine light on pulled code po410


this is caused by a defective seconday air injection pump, replace the pump.

Apr 06, 2009 | 1999 Chevrolet K1500

2 Answers

Code PO410


there is a TSB re: PO410 code, it is your air pump, you need to replace pump and other items, hose, cover filter. You will not pass insp. You may cause damage to cat and inturn burn out your intake plenum if you don't fix it.. cheaper to fix right. recomend reman. pump, save you alot of $.

Jun 06, 2008 | 2002 Oldsmobile Intrigue

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