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03 Apr 2004, 11:34 pm
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Trouble shooting EVAP system
I'm getting a check engine light and the code is coming up P-0442 Medium leak EVAP system, anyone have any Idea where I should look first to solve this problem or do I need to take it to the dealer?
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04 Apr 2004, 12:18 am
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Isn't that the loose gas cap warning? If warning doesn't go off, I think you have to take battery cable off.
__________________
"Anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge." Isaac Asimov" '05 Limited Turbo Lite, (Silver, of course)4-wheel ABS, Sunroof, Spoiler. Mods: E&G Classic grill, K&N FIPK, BTG duals, rear lowered 1.5", LED washer lights, $20 catch can, Aoogah horn, Weatherflectors, Sunroof Deflector, Fuzzy Dice, rear logo flames, rear pinstripe graphic, Gen3 Taillights, rear sway bar, hood struts, Strut bar. Traded in '02 Silver Touring Edition w/87,000 miles
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04 Apr 2004, 09:34 am
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Quote:
Pages 390-394 of the 2004 powertrain diagnostic manual. It details the diagnosis and testing of the EVAP system for that code. You need to verify the operation of the leak detection pump, fuel tank pressure sensor, evaporative emission hoses, charcoal canister, and EVAP vent solenoid. You can pressurize the system with an EVAP test machine and add smoke to visually locate the leak. The machine is about $2500, if you want one. Honestly,... this is what I do. It's not as easy to repair a fault as "just unhook the battery cable".
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