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BMW 330i code PO491

Po491

Posted by Anonymous on

4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

greg_margo
  • 1959 Answers

SOURCE: i'm trying to find out what these codes for my car

Both are fuel injection trouble codes. Possible causes are:

  • Air pump output is blocked or restricted
  • AIR bypass solenoid is leaking or it is restricted
  • AIR bypass solenoid is stuck open or stuck closed
  • Check valve (one or more) is damaged or leaking
  • Electric air injection pump hose(s) leaking

Posted on Jul 29, 2009

techbuster
  • 5081 Answers

SOURCE: po491 secondary aiy lnnjection system bank 1

You must replace the air injection system to correct this code

Posted on Feb 02, 2011

  • 142 Answers

SOURCE: i have the following codes

P0410 - SECONDARY AIR INJECTION (AIR) SYSTEM
P0491 - SECONDARY AIR INJECTION (AIR) SYSTEM INSUFFICIENT FLOW (BANK 1)

Secondary air injection (trademarked as Air Injection Reactor) is a process where fresh air is injected into the exhaust system to allow for a fuller combustion of exhaust gasses.

The possible causes are:
SAIR pump low or now air flow
SAIR bypass solenoid leaking/blocked or stuck open/closed
SAIR diverter valve leaking/blocked or stuck open/closed
SAIR air hose restriction
SAIR vacuum hose restriction or leaking

Check to make sure your air filter isn't dirty - and replace if needed. Otherwise I would suggest having your local trusted auto repair facility diagnose and repair the issue. A scan tool will be needed to properly diagnose the issue.

Posted on May 27, 2011

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1 Answer

Po491 passat 2004


This code indicates a leak in the secondary air system, there is a plastic hose running the front of the engine near the intake manifold, it might be cracked. You have about 20 sec to diagnose it as it shuts down pretty quickly.

May 31, 2014 | 2005 Nissan Altima

1 Answer

Code po 491 and po 492


P0491 Secondary Air Injection System (Bank 1)
P0492 Secondary Air Injection System (Bank 2)
Good luck for you!
OBD2 code reader

Jun 25, 2013 | 2001 BMW 330

1 Answer

2007ford fusion code po410 and po491


The Secondary Air System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up. The Secondary Air System typically has an Air Pump and some tubes or plumbing to route the air. The system also has a solenoid and Check Valve(s) to control the air flow.

Apr 09, 2013 | 2007 Ford Fusion I4 SEL Sedan

1 Answer

Codepo491


Manufacture Code

Google it

As with all codes, you have a repair shop
use the codes to diagnose the failed system

Mar 09, 2013 | 2006 Ford Fusion

1 Answer

Code po491 on my 07 fusion


Code 491 is for insufficient secondary air injection flow bank one.
There is a device that pumps fresh air into the exhaust system to lower emissions. The sensor that measures air flow is telling the computer the air flow is below standard.
The system would need to be tested.

Jan 21, 2013 | 2007 Ford Fusion I4 SEL Sedan

1 Answer

P1554 Trouble Code for 2006 BMW 330i


P1554 in bmw 330i means Engine Position System 'A' Performance (Bank 1)

Nov 04, 2011 | 2006 BMW 3 Series

2 Answers

I have the following codes po410 and po491.......can u please tell me what they are so I can get my car fixed asap


P0410 - SECONDARY AIR INJECTION (AIR) SYSTEM
P0491 - SECONDARY AIR INJECTION (AIR) SYSTEM INSUFFICIENT FLOW (BANK 1)

Secondary air injection (trademarked as Air Injection Reactor) is a process where fresh air is injected into the exhaust system to allow for a fuller combustion of exhaust gasses.

The possible causes are:
SAIR pump low or now air flow
SAIR bypass solenoid leaking/blocked or stuck open/closed
SAIR diverter valve leaking/blocked or stuck open/closed
SAIR air hose restriction
SAIR vacuum hose restriction or leaking

Check to make sure your air filter isn't dirty - and replace if needed. Otherwise I would suggest having your local trusted auto repair facility diagnose and repair the issue. A scan tool will be needed to properly diagnose the issue.

May 27, 2011 | 2006 Ford Focus

1 Answer

Po491 secondary aiy lnnjection system bank 1


You must replace the air injection system to correct this code

Feb 02, 2011 | 2002 Dodge Caravan

1 Answer

I'm trying to find out what these codes for my car means from this diagnostic test the codes are po491, and po492?


Both are fuel injection trouble codes. Possible causes are:
  • Air pump output is blocked or restricted
  • AIR bypass solenoid is leaking or it is restricted
  • AIR bypass solenoid is stuck open or stuck closed
  • Check valve (one or more) is damaged or leaking
  • Electric air injection pump hose(s) leaking

Jul 29, 2009 | BMW 530 Cars & Trucks

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