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Default Drive train malfunction - 10-20-2020, 05:44 AM

I purchased and installed jb4 last weekend took it for a test drive everything was great my 2016 550i hauled ass super happy with the outcome on my way home I had a drive train malfunction and went in limp mode broke my heart my moral sunk I got it home checked the code errors I got a terminal 15_2 short circuit maf code reduced power mode has anyone else got this N54Tech.com - International Turbo Racing Discussion

Last edited by Primefactor23; 10-29-2020 at 03:32 PM..
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Terry @ BMS Terry @ BMS is offline
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Default 10-20-2020, 11:39 AM

You can look up code descriptions here: BMW Fault Code Lookup - BMWFaultCodes

The problem codes are 130402, 130602. Looks like a VANOS issue rather than a tuning issue.


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 10-20-2020, 12:26 PM

Hmmmm interesting I didn’t have that problem before I put the tuner on but I got another question for you so the bmw I have with is a 2016 550i all stock when I put the jb4 in I plugged the t-map sensors and the other plug end I forget the name bcm maybe but I put those on you think that ****ed up the car to I have a warranty on the car so it’s now a the dealership so I’m trying to see what I did wrong oh and also I’m supposed to unplug the battery too before I install the jb4 also right
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Default 10-20-2020, 01:21 PM

Photo of BCM connection installs? Maybe put them in the wrong spots?


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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