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General E46 Forum
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Old 01-12-2013, 10:58 PM   #1
evo7
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Drove without oil cap. Now getting SES codes

Silly me! Did the OFHG today. Forgot to put the oil cap back on after adding some oil. Drove about 2-4 miles to a store. Noticed the engine was having few hiccups along the way, and idling was a little abnormal. So after putting the oil cap back on, the car ran like normal. But after about 15-20 mins of driving, SES light came on and gave the following codes....

CURRENT FAULT CODE:
P0174 (System too lean Bank 1)

PENDING CODES:
P0171 (System too lean Bank 2)
Misfiring cyl 1,2,3,5,6

I assumed the P0174 and the pending codes are a result of driving without the oil cap. I dont think I did any harm to the engine and clearing the codes should be fine. I just want to get a second opinion. Any thoughts?

Last edited by evo7; 01-12-2013 at 11:02 PM.
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Old 01-12-2013, 11:08 PM   #2
dmax
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Our engines go hundreds of thousands of miles...it won't care that you drove without the oil cap for a couple of miles. Clear the codes and I'm sure you'll be fine too.

If not, can I buy your amp for cheap?
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Last edited by dmax; 01-12-2013 at 11:08 PM.
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Old 01-12-2013, 11:15 PM   #3
BimmersGarage
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You should be fine now.
Clear the codes, good to go.
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Old 01-12-2013, 11:20 PM   #4
Zell
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Yes that's probably all it was.
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Old 01-13-2013, 09:01 AM   #5
lmr2wil
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You were undoubtedly pulling some unmetered air through the CCV system causing the car to run lean. As said, clear the codes and you should be good to go.

Luke
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