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SAE J2012 (MAR1999)

Recommended Practice for Diagnostic Trouble Code Definitions
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SAE J2012 (MAR1999)

Recommended Practice for Diagnostic Trouble Code Definitions

PUBLISH DATE 2026
PAGES 32
SAE J2012 (MAR1999)
This SAE Recommended Practice is applicable to all light-duty and medium-duty passenger vehicles and trucks with feedback fuel control system. Specific applications of this document include diagnostic, service and repair manuals, repair databases, and off-board readout devices. This document focuses on a diagnostic code format and code messages for automotive electronic control systems. The use and appropriate updating of this document is strongly encouraged; however, this document does not prohibit the use of additional codes for additional diagnostics.
SDO SAE: SAE International
Document Number J2012
Publication Date May 20, 2026
Language en - English
Page Count 32
Revision Level 199903
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