OBD fault code library
Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.
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Fault codes
U1201
SCP (J1850) Invalid or Missing Data for Seat Motion / Control
Communication Network System
High severity
U1217
SCP (J1850) Invalid or Missing Data for External Lamp Outage
Communication Network System
High severity
U1239
SCP (J1850) Invalid or Missing Data for Experimental 4
Communication Network System
High severity
U2003
Audio Compact Disk / Disk Jockey Unit is Not Responding
Communication Network System
High severity
U0121
Lost Communication With Anti-Lock Brake System (ABS) Control Module
Communication Network System
High severity
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