OBD II Fault Code P9000 :

Description of Fault code P9000

Communication circuit error (BUS Off)
When the Bus is cut off, all of the signal transmissions of B-CAN line are stopped, and multiple DTCs, indicating communication error between units, are stored at the same time. When DTCs, indicating Bus off, are stored, be sure to perform the troubleshooting for Bus off first. 

Possible failuer P9000

MICU

Diagnostic Procedure using AutoHex II Scan Tool

• The low level of the ignition signal is detected at initializing Engine Control Module (ECM). (The Engine Control Module (ECM) started without input of the ignition signals.)

Test Conditions using AutoHex tester

• The Engine Control Module (ECM) is initialized
• The Engine Control Module (ECM) reset by the program malfunction and the Engine Control Module (ECM) internal hardware malfunction isn't executed.

Clear Fault codes Conditions

• The low level of the ignition signal is detected at initializing Engine Control Module (ECM). (The Engine Control Module (ECM) started without input of the ignition signals.)

MIL Status

• Glow ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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