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Diagnostic Trouble Code Definitions

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC (1) Description
U1000 & U1255  Class 2 Communication Malfunction
U1001-U1254  Lost Communication With XXX
U1300  Class 2 Data Line Voltage Is Low
U1301  Class 2 Data Line Voltage Is High
(1) Perform appropriate test under DIAGNOSTIC TESTS  . Codes listed in this table are only for testing covered in this article. For a complete list of codes, see DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - GASOLINE or DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - DIESEL article in ENGINE PERFORMANCE.
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