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Home >> Saab >> 2003 >> 9-3 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (TRIONIC T7 Fuel Control System) >> Technical Description >> Bus communication >> Intermittent bus faults

Intermittent bus faults

WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Trionic continuously checks to see that TCM and MIU are communicating correctly. Diagnostic trouble codes will be generated if an intermittent fault should occur in bus communication. The cause of the fault could be that the power supply or one of the bus leads to a control module is missing

MISSING CONTROL MODULES AND DIAGNOSTIC TROUBLE CODES

Missing control module Diagnostic trouble code
TCM P1623
MIU P1622
TC/ABS P1625
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