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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 08-31-2007, 06:50 PM   #1 (permalink)
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check engine issues 1221 code

I have a problem with the o2 sensor. I had the check engine light come on 1221 code. o2 sensor no problem changed the sensor and the light went out. now it will come back on and go off sometimes quickly sometimes it takes a couple days. I notice no running problems. runs idles and the fuel mileage is the same. has anybody had this problem before? If so how did you fix it? Thanks for all your help in the past
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Old 08-31-2007, 09:41 PM   #2 (permalink)
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Forgot to mention the car is a 1993 325 is 5 speed. o2 sensor was replaced with a Bosch unit the car also has a Dinan cold air intake any help would be appreciated
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Old 10-03-2007, 09:57 AM   #3 (permalink)
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was that the pre or post cat sensor?
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Old 10-12-2007, 11:24 PM   #4 (permalink)
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I love BMW's but I think some of their sensors aren't the greatest. I replaced my O2 sensor with an $81 Bosch sensor a couple of months ago and I had the sensor turn on and off the other day. I was PISSED when I saw it come on and tested it manually finding out it was the O2 sensor again. The next day it was gone however, and I was happy again - ha. Hasn't turned on since. My onboard computer likes to tell me i'm low coolant all the time - common E36 problem from what I read here - it also likes to tell me there is a fault in the brake light system - haven't found one, lights work fine. My license plate light decided to turn off the other night as well. I figured out how to take it apart, did so, put it back together, and when I got to the auto parts store it was working fine. Go figure. Personally, I wouldn't even worry about it unless it happens excessively, and even then if the car is running fine and you can't find any issues..... unless anyone else has some thoughts....
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Old 10-20-2007, 09:57 AM   #5 (permalink)
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No running issues at all. my car always tell me the coolant is low and a license plate light failure. must be a common problem. I have decided not to worry about it I have pulled enough hair out
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Old 10-20-2007, 09:58 AM   #6 (permalink)
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found the fix to the check engine light!!! a small piece of black tape on the dash and the light dissappears
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Old 10-20-2007, 10:25 AM   #7 (permalink)
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tape

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found the fix to the check engine light!!! a small piece of black tape on the dash and the light dissappears
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Old 10-28-2007, 07:35 PM   #8 (permalink)
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lmfao i wish.. ive got a check engine light and when scanned it says o2 sensor voltage for the sensors i just replaced .. any idea if its cuz i used a universal o2 sensor and not a oem cuz it is missin on the cyl's they are connected to
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Old 10-29-2007, 09:16 AM   #9 (permalink)
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Quote:
Originally Posted by seven
found the fix to the check engine light!!! a small piece of black tape on the dash and the light dissappears
Until something else more serious happens then you won't know until it's too late.
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Old 10-29-2007, 05:56 PM   #10 (permalink)
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+1
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Old 03-26-2008, 10:32 AM   #11 (permalink)
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Reset the check engine light?

Anybody know how to reset the check engine light?
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