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Audi a6 troubleshooting

P0491,p0492

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

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Posted on Jan 02, 2017

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  • 57 Answers

SOURCE: check engine light is on

it will have to be fixed or it wont pass inspection

the big brain

Posted on Jan 14, 2011

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  • 42 Answers

SOURCE: 2005 audi a6 backup sensor stopped working

One of the four sensors have failed. Only solution is to replace the faulty one.

Posted on Dec 06, 2008

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Have a 01 bmw 325ci had code 0491 and 0492 secondary air insufficient i changed the check valve control switch vacum lines water pump 02 sensors up stream thermostat still get the codes can any one tell me...


Did you check the Vacuum lines to the Secondary air Valve Controls. They may be rotten. Can you do a Smoke test. Replace dry rotted lines with either 3/16 Fuel or Power Steering Hoses if you do not get ORM Vacuum lines/hoses. There are many Vedios on You Tube showing this specific problem solving on German cars. you can check out these,
Secondary Air Injection Systems on German Vehicles E39) 2001 BMW 525i Resolve P0491/P0492 for less than $2.00 in approx 15min. How to Fix and Diagnose BMW P0491 P0492 Secondary Air / Vacuum Leak E36 E46 E39 E53

I’m happy to assist further over the phone at https://www.6ya.com/expert/uttamjeet_2f3adc18600f8ede

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What are the problems exactly. You are being to generic.

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What is code p0491 and code p0492


these refer to the secondary air intake system , insufficient flow . this could be an electrical fault or a component such as the relay , solenoid etc, follow this link for more info
BMW Secondary Air System Fault Code Diagnosing How To DIY OBD II

Jun 24, 2014 | 2005 BMW 645Ci

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

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Sometimes can't get reverse gear Audi A6 2004 Auto 1.9TDi UK


Unless your shade tree mechanic is an Audi expert, go to the dealer who has all the books and diagrams that tell the tech exactly where to look. The other guy may want to replace something just to troubleshoot and the factory tech should know exactly what to replace or which plug is loose.

Sep 20, 2009 | 2003 Audi A6

1 Answer

2005 audi a6 backup sensor stopped working


One of the four sensors have failed. Only solution is to replace the faulty one.

Dec 06, 2008 | 2006 Audi A6

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