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Communication DTCS (U Codes)

DIAGNOSTIC TROUBLE CODE (DTC) CHART

DTC Description Source Action
U1027 Missing or Invalid Throttle Message NGSC Module CARRY OUT the PCM self-test. REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE .
U1041 Missing or Invalid Speed Message NGSC Module CARRY OUT the ABS self-test. REFER to ANTI-LOCK CONTROL-TRACTION CONTROL or ANTI-LOCK CONTROL-TRACTION CONTROL & STABILIT .
U1051 Missing or Invalid Brake Message NGSC Module CARRY OUT the REM self-test.
U1059 Missing or Invalid PRNDL Message NGSC Module CARRY OUT the PCM self-test. REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE .
U2013 Compass Module is Not Responding MC Module REFER to INFORMATION AND MESSAGE CENTER .
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