E46Fanatics - View Single Post - HELP : car wont start, code P0171/P0174
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Old 01-17-2013, 08:37 PM   #6
OEM ///Member
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 23,234
My Ride: 330CiC, M5, X5, E93
Suggest you read the first 2 links below in my signature.

Keep in mind, many times even if you find a single problem like the DISA that seems to clear your codes, you may in fact have other problems.

The only way to verify you engine is running properly is to verify fuel trims with a scan tool that can read real time data.

Also while you are at it, verify you coolant temp is correct as well, see this link - http://forum.e46fanatics.com/showthr...ght=thermostat
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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