Drove without oil cap. Now getting SES codes

evo7 · 01-12-2013, 09:58 PM

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?

dmax · 01-12-2013, 10:08 PM

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?

BimmersGarage · 01-12-2013, 10:15 PM

You should be fine now.
Clear the codes, good to go.

Zell · 01-12-2013, 10:20 PM

Yes that's probably all it was.

lmr2wil · 01-13-2013, 08:01 AM

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

01-12-2013, 09:58 PM	#1
evo7 Registered User Join Date: Sep 2011 Location: TX-CA Posts: 62 My Ride: 2003 330i View My Garage	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 10:02 PM.

01-12-2013, 10:08 PM	#2
dmax Stay stock my friends! Join Date: Aug 2006 Location: Unit I Posts: 21,138 My Ride: '99 328i 1.03809 mu View My Garage	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? __________________ This huge woman, like 400 pounds comes up to me and says, "Doug, I would rock your world." I replied, "but I need to breathe." The girl in my sig:http://forum.e46fanatics.com/showthr...highlight=dmax Last edited by dmax; 01-12-2013 at 10:08 PM.

01-12-2013, 10:15 PM	#3
BimmersGarage Registered User Join Date: Mar 2010 Location: Dallas, TX (USA) Posts: 2,000 My Ride: E46 330i View My Garage	You should be fine now. Clear the codes, good to go. __________________ DFW Bimmer Meet \| BMW Instrument Cluster Test \| DIY BMW Rad. Fan/Clutch Removal \| DIY BMW Serpentine Belt Release DIY Idler Pulley Removal \| DIY Mechanical Tensioner Pulley Removal

01-12-2013, 10:20 PM	#4
Zell Wears carbon fiber boxers Join Date: Jun 2009 Location: In a van down by the river Posts: 3,690 My Ride: 330Ci ZHP 6sp View My Garage	Yes that's probably all it was. __________________ E46Fanatic's resident mathemagician

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01-13-2013, 08:01 AM	#5
lmr2wil Registered User Join Date: Oct 2010 Location: MI Posts: 413 My Ride: '00 328Ci View My Garage	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