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Thread: DME 1221 Code M60 - O2 sensor Relay

  1. #1
    new540iowner Guest

    Default DME 1221 Code M60 - O2 sensor Relay

    Well, after one and a half years of owning my 94 540, I finally figured out
    why I was getting this code despite changing the old sensors with new
    sensors. My symptoms were a rough idle when cold which worked itself out when warmed up. All intake manifold gaskets (front, rear and 4 bottom) were replaced along with a fuel pressure regulator, new fuel injectors, new ignition coils, new motor mounts and a new idle control valve. After all these items were replaced, I was still getting the 1221 code but couldn't figure out why I was getting 18-21 MPG and the rough running in the morning. So I said to myself, "Let's check the 12V signal to the O2 sensors coming from the relay when the car was started." So I pulled out the voltmeter and didn't get any 12V signal from either O2 sensor. Next step was to open up the E-Box and pull the relay. The relay on my car was underneath in the middle and closest to the passenger side wheel. I probed the "hot" 12V terminal on the relay receptacle and I was indeed getting 12V.
    I then proceeded to the stealer for the replacement relay ($15) and reinstalled. Reset the battery and started up. DME now returns a series of 1444 codes which means everything is clear. Hope this helps someone else!

  2. #2
    Join Date
    Jan 2004
    Location
    Boston & Attleboro MA
    Posts
    727

    Default OMG... Pays to search Archives... I missed this... It's MY Problem too!!

    Sun is shinning on me today!!!!!!!!!!

  3. #3
    Join Date
    Jan 2004
    Location
    Boston & Attleboro MA
    Posts
    727

    Default BTW... Would anyone know the Part# for this Relay?

    THANKS!

    Quote Originally Posted by new540iowner
    Well, after one and a half years of owning my 94 540, I finally figured out
    why I was getting this code despite changing the old sensors with new
    sensors. My symptoms were a rough idle when cold which worked itself out when warmed up. All intake manifold gaskets (front, rear and 4 bottom) were replaced along with a fuel pressure regulator, new fuel injectors, new ignition coils, new motor mounts and a new idle control valve. After all these items were replaced, I was still getting the 1221 code but couldn't figure out why I was getting 18-21 MPG and the rough running in the morning. So I said to myself, "Let's check the 12V signal to the O2 sensors coming from the relay when the car was started." So I pulled out the voltmeter and didn't get any 12V signal from either O2 sensor. Next step was to open up the E-Box and pull the relay. The relay on my car was underneath in the middle and closest to the passenger side wheel. I probed the "hot" 12V terminal on the relay receptacle and I was indeed getting 12V.
    I then proceeded to the stealer for the replacement relay ($15) and reinstalled. Reset the battery and started up. DME now returns a series of 1444 codes which means everything is clear. Hope this helps someone else!

  4. #4
    Join Date
    Sep 2006
    Location
    San Jose, CA
    Posts
    134

    Default dig up the old post

    Quote Originally Posted by DaCan23
    THANKS!
    I am about to order 2 O2 sensors for my 94 530i that throws 1221 code. I want to just change this relay as well for preventive action. Could anyone tell me the part number and where this relay is located?

    Thanks!
    94' AlpineWhite 530i, 5 spd Auto, 112K miles, Mfg in 4/93

  5. #5
    Join Date
    Mar 2006
    Location
    USA
    Posts
    1,839

    Default

    i believe it is 61361378238
    Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue

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