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Old 05-21-2007, 12:45 AM   #1
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this part is just the fore-info, the actual question is in the next paragraph: i read my codes with someone else'* tool on friday and got two error codes, one the infamous p0171 (bank one too lean) and [can't remember the number] evap control problem. my shop teacher told me they would be related, and i found the evap problem and fixed it. then after reading on here more, found that p0171 is caused by corroded battery cables? so i cleaned it as good as i could without a wire brush.

so, after reading the threads about code reading, i see a lot of mention on "clearing the codes". did i miss something with the scantool? cuz my CEL is still on.
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Old 05-21-2007, 01:10 AM   #2
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Disconnect the battery for 30 minutes if you didn't clear it with the scantool. If the light comes back on, you still have a problem.

An evap problem is usually vacuum related. HOW did you fix it? If you have a vacuum leak, you will run too lean. Vacuum leaks pull in air that is not metered (seen) by the MAF sensor.
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Old 05-21-2007, 01:26 AM   #3
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the line that connects the evap canister to the fuel tank was pinched under the motor mount, so i cut out part and replaced it with some rubber hose and clamped it on.

i have had a vacuum leak, and it was idling rough, but i sealed it with weatherstrip and the rough idle went away, and eventually the CEL went out.
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Old 05-22-2007, 12:30 PM   #4
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i have the same two codes. P0171 and P0441 , i think it was, i replaced all my vacuum lines except the one you had mentioned under the motor mount, but i have not tried to fix the 171 code yet, havent had any time, still have the 441 code too, incorrect purge flow from evap canister..
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