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Bank 1 Mass Airflow Sensor

Discussion in 'Technical Q&A' started by jim94-348, Nov 27, 2012.

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  1. jim94-348

    jim94-348 Formula Junior
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    #1 jim94-348, Nov 27, 2012
    I have a bad Mass Airflow sensor on Bank 1 of my 2000 360. I am getting P1223. I just purchased a new MAF and need to install it. I checked to make sure it was the MAF with my ODBII device and one MAF reads bad so I'm sure that is the problem. Is Bank 1 the driver side or passenger side? I know they aren't that hard to remove and it is a 50/50 shot but I'm a firm believer in not messing with something if it isn't bad.
     
  2. FerrariDublin

    FerrariDublin F1 Rookie

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    #2 FerrariDublin, Nov 27, 2012
    Bank 1 is cylinders 1~4 (right hand side as you look into the engine bay).

    What's your interpretation of the code though? I'm seeing an error relating to an injector (1) on bank 1, not MAF.

    When you say you've checked the MAF with your OBD and one of them reads bad what exactly are you seeing?
     
  3. rustybits

    rustybits F1 Rookie
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    #3 rustybits, Nov 28, 2012
    Last edited: Nov 28, 2012
    I'd be suprised if you have a specific MAF fault code. Usually when the MAF's go bad it shows up as a huge adaptive fuel trim value.....

    I have P1223 listed as Injector 1, as above..
     
  4. eric355

    eric355 Formula 3
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    #4 eric355, Nov 28, 2012
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    In the DTC list I have, there is nothing between P1220 and P1225 (P1213 to P1220 being injectors circuit short to B+, P1225 to P1232 being injectors circuit short to ground, P1237 to 1244 being injectors circuit open).

    Is there a more complete list available?
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  5. jim94-348

    jim94-348 Formula Junior
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    #5 jim94-348, Nov 28, 2012
    Sorry but I haven't had access to the car to get back to anyone. When I finally did today I had cleared the fault. I was going from memory on the 1223 and searched my history on the computer and found it was actually a 1123 code. When I searched FChat the main reasons for this fault are a bad manifold gasket which appears fine and I am not getting any draw from smoke near it. The others were a bad fuel pump and ignition coil and the final one was the MAF. I have all the symptoms of a bad MAF. The car is hesitating sometimes when I press the accelerator like like an old Holley carb that is loading up and the car seems to be idling rougher than normal. I didn't get the code until after about a two hour interstate drive when I came to a stop. I've got another MAF to try so that is the easiest. I believe this is bank one so I'll try the passenger side (Left hand drive) first. I have to get some new clamps first since they are original to the car and are the type that are hard to reuse.
     
  6. rustybits

    rustybits F1 Rookie
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    #6 rustybits, Nov 28, 2012
    If you stand at the rear of the car, the right bank is bank 1, with cylinder one being at the front (furthest from you)
     
  7. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #7 Rifledriver, Nov 28, 2012
    Its a crossflow manifold.

    Bank 1 MAF is on the left.
     
  8. rustybits

    rustybits F1 Rookie
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    #8 rustybits, Nov 28, 2012
    Sorry, my post was confusing, meant engine bank! Well spotted! :)
     
  9. jim94-348

    jim94-348 Formula Junior
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    #9 jim94-348, Nov 28, 2012
    Great thanks! Is the MAF a common problem on the 360? Only 20k miles so it is an early failure for one in my opinion.
     
  10. FerrariDublin

    FerrariDublin F1 Rookie

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    #10 FerrariDublin, Nov 28, 2012
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    Eric, attached is an alternative OBD list which is in "soft" format which means you can search on it. I didn't get a direct match for P1223 but I did find a Pi223. Anyway, you'll find this useful, if only for the ablity to search on it. I typically find myself comparing both the original list you posted and this one if/whenever I have a code.

    Jim, you can replace just the actual sensor core if you have the correct torx fitting. I've certainly swapped mine from side to side on occasion. Shame to open up the original clamps if you don't have to.

    Brian, wasn't aware you were back posting here. Good to "see" you. Often found your posts to be informative. We'll have to start a timing belt thread just to get you into the swing of things again! :)

    It's certainly a commonly "suspected" component. Just how often the MAF itself turns out to be the faulty item I'm not sure. I feel it's often replaced because it's relatively easy and cheap to do so. Eddie or Brian could probably offer a better response based on actual experience.
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  11. eric355

    eric355 Formula 3
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    #11 eric355, Nov 28, 2012
    Greg, I know this list and I do think it has been generated, from the original one I posted, with a character recognition software. That explains why there are so many typo errors (for exemple the P1225 has been converted to PI223 because the 1 and 5 are barely readable).
     
  12. FerrariDublin

    FerrariDublin F1 Rookie

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    #12 FerrariDublin, Nov 28, 2012
    Yes, I'm sure you're correct. That's probably why I always start with the soft version but find myself going back to the one with the handwriting on. The English on the soft version is even worse than the earlier one and, as you say, it probably is because of bad scan.

    Still useful to have both!

    Best!
     

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