IAT trouble
IAT trouble
Originally Posted by studman
The SES light is on because the 2002-2003 MAF sensors also house an air temperature sensor in them that the 2000-2001's don't. So the MAF sensor is ok, but the SES light is on because of an invalid reading from the intake air temperature. If you go read it with a code reader, the code should be either P0112 or P0113 (IAT Sensor Error). I have a thread about 387923 pages long about the MAF issues with the 2002+.
I talked to a tech at my local dealer who told me this: Nissan knows about the dead MAFs. When they replace it, they not only replace the MAF itself, but they REPROGRAM AND RESET THE ECU. He didn't know what the changes were exactly, but told me that it has helped keep the new MAFs from going bad again.
22680-6N200 (2002 MAF - Defective - Don't use aftermarket intake with this MAF)
22680-6N201 (2002 MAF - Replaced the 22680-6N200 - Needs ECU update in order not to fail with this MAF)
22680-AM600 (2003 MAF - 2003 ECUs already have update, but 2002 ECUs need the update in order not to fail with this MAF)
All of that research leads me to believe that the MAF isn't actually dying (or that the ECU is blowing the MAF - instead of the MAF dying because of excess air/moisture/oil/etc). So until I can find someone with a TSB document (or a Nissan tech who can tell me what they change when reprogramming the ECU), you're taking a chance if you are a 2002. The 2003's have very little cases where the ECU needs updating (or a normal defect in production (1 in 1000)).
Hope this helps.
I talked to a tech at my local dealer who told me this: Nissan knows about the dead MAFs. When they replace it, they not only replace the MAF itself, but they REPROGRAM AND RESET THE ECU. He didn't know what the changes were exactly, but told me that it has helped keep the new MAFs from going bad again.
22680-6N200 (2002 MAF - Defective - Don't use aftermarket intake with this MAF)
22680-6N201 (2002 MAF - Replaced the 22680-6N200 - Needs ECU update in order not to fail with this MAF)
22680-AM600 (2003 MAF - 2003 ECUs already have update, but 2002 ECUs need the update in order not to fail with this MAF)
All of that research leads me to believe that the MAF isn't actually dying (or that the ECU is blowing the MAF - instead of the MAF dying because of excess air/moisture/oil/etc). So until I can find someone with a TSB document (or a Nissan tech who can tell me what they change when reprogramming the ECU), you're taking a chance if you are a 2002. The 2003's have very little cases where the ECU needs updating (or a normal defect in production (1 in 1000)).
Hope this helps.
So I replaced my MAF a few months ago from a 22680-6N200 to a 22680-2Y001. I did transfer the IAT to the new MAF. I did not get the ECU reprogrammed at the time. I just reset the ECU. Now I am popping a P0113 every now and then. I see that the ECU might need to be reprogrammed to handle this new MAF and the code could just be a product of it not being reprogrammed. Also, does anyone know if the MAF actually goes bad or just pops this code if you don't get it reprogrammed?
The car drives fine but would there be an issue with driving around with the code on?
If so, and it does need to be reprogrammed, what reprogramming do you specifically ask for? Or do you just mention you need your ECU reprogrammed because you just changed the MAF?
I have a 2y001 MAF on my car and transferred the IAT sensor....drove around like this for one week until I got my ecu reprogrammed....didn't pop up any codes...did your's pop up immediately? Mine was perfectly SES free for that one week I drove around until I got it re-programed at the stealership
Originally Posted by steven88
I have a 2y001 MAF on my car and transferred the IAT sensor....drove around like this for one week until I got my ecu reprogrammed....didn't pop up any codes...did your's pop up immediately? Mine was perfectly SES free for that one week I drove around until I got it re-programed at the stealership
I am wondering if my MAF could have gone bad since I didn't get it reprogrammed or could I just go ahead and get it reprogrammed and it should be fine. I know the MAF isn't bad now, doesn't drive like it, just popping the code.
What re-programming did you ask for at the dealership?
Originally Posted by Epacy
No, as I said I put it on a couple of months ago. I am just now popping the code.
I am wondering if my MAF could have gone bad since I didn't get it reprogrammed or could I just go ahead and get it reprogrammed and it should be fine. I know the MAF isn't bad now, doesn't drive like it, just popping the code.
What re-programming did you ask for at the dealership?
I am wondering if my MAF could have gone bad since I didn't get it reprogrammed or could I just go ahead and get it reprogrammed and it should be fine. I know the MAF isn't bad now, doesn't drive like it, just popping the code.
What re-programming did you ask for at the dealership?
Originally Posted by E55AMG2
I have a couple spare (AM600) MAFs if you'd like one
I think I'll go and get it reprogrammed, but would hate to lose the money to the dealer if the MAF has gone bad. Although, like I said, it runs fine. Idle is a little rough, but other than that it is fine.
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Joined: Feb 2004
Posts: 285
I had the same problem as well when I switched from a 22680-6N200 to a 22680-2Y001. I've had the 2y001 (without a ECU reflash) on since April, but haven't put more than 500 miles on the car since then. Then suddenly one day the SES appeared with the IAT code, however the car still runs strong and normal. I then disassembled the MAF and checked the connection of the IAT thermistor on the MAF, and squeezed the prongs holding it a bit tighter, then reinstalled. I also removed the lower intake pipe of my Injen intake to switch to a shorter setup similar to the FC/Berk. Since then I haven't had any problems. So all I can suggest is checking the connection of the thermistor.
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