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16825 - EVAP Emission Control Sys: Incorrect Flow discussion

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Old 02-12-2006, 03:25 PM
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Default 16825 - EVAP Emission Control Sys: Incorrect Flow discussion

According to the archives, there are three or four potential problems that can cause this code.

1. It's cold.
2. N80 valve.
3. N75 valves/boost leak.
4. Loose gas cap/bad return line.

My question is which one of these is most likely to cause a significant decrease in gas mileage. The above is the only code that I'm getting, though my cat and O2 readiness codes still aren't in the green. Would that code keep those two from going green?
Old 02-12-2006, 03:41 PM
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Default I had the same code come up today. My guess is the cold weather but I will be checking for leaks

soon.
Old 02-12-2006, 05:00 PM
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You gonna check for boost leaks or evap leaks or both?
Old 02-12-2006, 05:26 PM
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Default I am actually about to install a samco tbb so I will be pressure testing for boost leaks as well as

look into the evap leak problem.
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