LEMON Manuals
: Even more car manuals for everyone
Home
>>
Mazda
>>
2007
>>
CX-9 V6-3.5L
>>
Repair and Diagnosis
>>
A L L Diagnostic Trouble Codes ( DTC )
>>
Testing and Inspection
>>
U Code Charts
>>
U0121
U0121
U0121 - Communication error to DSC/RSC HUCM
Procedures For Determining the Location of A Malfunction (Multiplex Communication System)