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07-21-2007, 02:43 PM
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1st Gear
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Join Date: Apr 2006
Location: Littleton, CO
Posts: 75
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P0491 and P0492??
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Got these codes saying Secondary Air System bak 1 and bank 2? What could this be? I had them reset and the CEL hasn't come back on yet....?
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Tim Olson
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07-22-2007, 12:17 AM
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4th Gear
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Join Date: May 2004
Location: Northern NJ USA
Posts: 3,968
Level up: 4%, 193 Points needed |
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RE: P0491 and P0492??
Bentley Publishers doesn't list those codes. Lets hope they
don't return.
__________________
2009 Subaru Impreza 2.5i Auto 4dr Premium
Previous Car
2001 A4 1.8T Q Casablanca White, Tip, ESP, Xenon and Premium
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07-22-2007, 09:07 AM
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1st Gear
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Join Date: Jun 2006
Location:
Posts: 434
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RE: P0491 and P0492??
could be a combi valve or the vacuum lines to the valves. Do you hear the pump running after start up(sounds like a hair dryer). If the engine is already hot enough though you will not hear it run
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07-22-2007, 12:11 PM
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Senior Member
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Join Date: May 2006
Location: Townsend, MA
Posts: 607
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RE: P0491 and P0492??
This is a picture of the secondary air injection pump. You might want to check the hoses for any leaks.
[IMG]local://upfiles/18457/4C1472AF8F5D45BEBF4FC73745E9D577.jpg[/IMG]
__________________
2004 S4 6MT black
99.5 A4 1.8TQM red and 17" A6 4.2 wheels *sold
97 A4 1.8TQMS silver & lots of mods *totaled
96 A4 2.8M black *totaled
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07-22-2007, 12:11 PM
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Tags
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01, 0491, 0492, 2000, 2001, 2004, 42, a4, a6, air, audi, code, injection, kombi, p0491, p0492, secondary, system, trouble  |
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