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Infiniti Forum: U0100 Lost Communication with ECM/PCM
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Old 04-24-2018, 06:19 PM
ChesbayQX56 ChesbayQX56 is offline
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Join Date: Sep 2016
Posts: 15
Default U0100 Lost Communication with ECM/PCM

I just cleared this fault on my 2013 QX56. Has anyone ever had this fault?
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Old 04-24-2018, 09:56 PM
marctronixx marctronixx is offline
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Join Date: Sep 2011
Location: Los Angeles
Posts: 1,213

its definitely not common on any car really. that code means a fault at a main part of the system.. either the brain, bcm, tcm, or a harness.

did you get /see any other codes?

did the car /has the car been acting up or behaving differently?

did you modify anything prior?

are you the only owner of this car or is it used?

have you had any other rare codes on the car before?

was the MIL/check engine lamp on? flashing or steady lit?
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ecm, pcm, u0100

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