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P1871 and U0100 problems

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Old Sep 5, 2013 | 04:40 PM
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ApexVIII
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From: Modesto, CA
P1871 and U0100 problems
what would cause these codes/ what do they mean
P1871
U0100

i just bought the car 2010 Evo X SE 13k miles
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Old Sep 5, 2013 | 05:47 PM
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evo 1768
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From: kissimmee fl
P1871 - Transmission Mechanical Transfer Case 4x4 Switch Circuit Short To Battery,,, U0100 ...Lost communication with ECM
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Old Sep 5, 2013 | 05:57 PM
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ApexVIII
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Originally Posted by evo 1768
P1871 - Transmission Mechanical Transfer Case 4x4 Switch Circuit Short To Battery,,, U0100 ...Lost communication with ECM
Ok so nothing major? I reset the light how would I go about fixing it?
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Old Feb 24, 2014 | 12:42 PM
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From: phoenix
did you end up to fix the codes?
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Old Jul 6, 2015 | 04:37 AM
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no-slip
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From: michigan
P1871
What was the conclusion of this ????? Had the same issue!!!!!! Just had the dealer check it out today and they advised me that it was a faulty module and its covered under p/t warranty.
Last edited by no-slip; Jul 6, 2015 at 08:55 AM.
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Old Dec 15, 2015 | 10:45 PM
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RAC
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From: (CA) LA,SD,SF, SFV.
Having the same issue, what part was it?

Thanks in advance
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