Hi there, first time posting here. Great site!! Helped with a few little issues already:-)
Unfortunately I haven't found a problem on this site similar to mine?
I have a 2005 4-Door StratusSXT with 70,000 miles 4-cyl.
Engine light popped on, my reader says its code P0491-Secondary Air Injection System (Bank 1)
Question is what is the Secondary Air Injection System (Bank 1) and is it something a DIY guy can handle or do I need a mechanic?
Any advice on this would be greatly appreciated, Thanks:-)

 

P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow
P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow

Possible cause of fault
- Electrical fault in power supply or line between relay and secondary air injection pump
- Secondary air injection pump relay mechanically faulty
- Mechanical fault in electrical secondary air valve
- Pneumatic secondary air valve faulty/sluggish
- Electrical fault in secondary air injection pump
- Mechanical fault in secondary air injection pump or secondary air injection pump blocked
- Vacuum system leaking
- Air hose to secondary air injection pump slipped off or constricted

 

Hi John, thanks for the advice:-)
But I need a little more help? I have the Haynes Repair Manual and it makes no mention of what the Secondary Air Injection SystemIS or WHERE its located:-) ??
Thanks again for your help:-)

P.S.- Is this problem something that requires immediate attention or is it something that I can live with for a bit??

 

I have the same problem. Haynes makes no mention of the meaning of the code, the location of the air pump (if one exists). I am beginning to wonder if the code has some other meaning for this vehicle.

2004 Stratus 2.4L DOHC

EDIT: I finally got a lead...
http://www.2gstratus.org/forums/inde...0&#entry457010

 

I have A 2005 dodge stratus and its coding a bank 1 p171
What code is this

 

p0171 system to lean bank 1 the oxygen sensor closest to engine detected to much oxygen in bank 1(bank 1 is side with #1 cylinder in it). could be anything from a vacuum leak, bad or stuck pcv valve or hose leaking ,bad oxygen sensor, dirty or bad mass air flow sensor, exhaust leak between engine and sensor ,bad injector, low fuel pressure

 

Did you ever get this fixed? Was it the pump?