Do I need a rebuild?
Background
2011 Ralliart
Roughly 103k
Mods: AEM intake, CXRacing intercooler with piping & bov, and a Cobb 3 port
So my SES light came on yesterday right before i headed on a 3 hour round trip to pick up a downpipe. No issues driving with light on. Scanned the code this morning and pulled a U0100 chassis code and a P1871 transmission code.
According to my scanner thats a manufacture specific code. Obd-data website says its a "Undefined Gear Ratio" code Transmission mechanical transfer case 4x4 switch circuit short to battery. (P1871)
Code U0100 is a "Lost Communication with ECM/PCM A"
Cleared it hoping it was just a false alarm but the codes came back after a drive around town. Do i need a rebuild or can it be saved?
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