DTC Description Possible Causes Action U0401-08
Invalid Data Received
From ECM/PCM A - Bus
Signal Message Failures
Inaccurate engine speed,
torque information
Check Engine Control Module for stored DTCs,
Check CAN Bus circuit for faults U0401-68
Invalid Data Received
from ECM/PCM A - Event
information
Inaccurate engine speed,
torque information
Check Engine Control Module for stored DTCs.
Check CAN Bus Circuit for fault U0401-86
Invalid Data Received
from ECM/PCM A - Signal
Invalid
Inaccurate engine speed,
torque information
Check Engine Control Module for stored DTCs.
Check CAN Bus Circuit for fault U0404-68
Invalid Data Received
from Gear Shift Control
Module A - Event
information
Incorrect CAN data
received from
Transmission Shift
Module
Check Transmission Shift Module for stored DTCs.
Refer to Circuit diagrams and check CAN and LIN
Bus for Circuit fault U0404-81
Invalid Data Received
from Gear Shift Control
Module A - Invalid Serial
Data Received
Incorrect LIN data
received from
Transmission Shift
Module
Check Transmission Shift Module for stored DTCs.
Refer to Circuit diagrams and check CAN and LIN
Bus for Circuit fault U0416-68
Invalid Data Received
From Vehicle Dynamics
Control Module - Event
information
Event information brake
information
Check Engine Control Module for stored DTCs.
Check CAN Bus Circuit for fault U0422-68
Invalid Data Received
From Body Control
Module - Event
information
Event information invalid
Power mode information
Check Central Junction Box for stored DTCs. Check
CAN Bus Circuit for fault U101B-87
Lost Communication With
GSM - Multiple Bus -
Missing message
Missing message lost
communication with
Transmission Shift
Module (multiple Bus)
Check Transmission Shift Module for stored DTCs.
Refer to Circuit diagrams and check CAN and LIN
Bus for Circuit fault U3000-49
Control Module - Internal
electronic failure
Internal electronic failure
Suspect the Transmission Control Module. Install a
new Transmission Control Module as required,
refer to the warranty policy and procedures manual
if a module/component is suspect. U3000-4B
Control Module - Circuit
resistance above
threshold
Internal electronic failure
Check and correct oil level. Check hydraulic flow
through oil cooler and pipe circuit for restriction or
blockage. If no restrictions found, suspect the
Transmission Control Module. Install a new
Transmission Control Module as required, refer to
the warranty policy and procedures manual if a
module/component is suspect. U3000-81
Control Module - Invalid
serial data received
Vehicle or Engine type
signal incorrect from
Central Junction Box or
incorrect Transmission
Control Module software
installed
Reflash the Transmission Control Module using the
manufacturer approved process U3001-94
Control Module Improper
Shutdown - Unexpected
operation
Control Module Improper
Shutdown (voltage
related)
Check Engine Control Module For Power
(alternator) faults. Check Power and Ground
Circuit and Battery for fault. Clear DTCs. Road
Test. If DTC reoccurs suspect the Transmission
Control Module. Install a new Transmission Control
Module as required, refer to the warranty policy
and procedures manual if a module/component is
suspect.
DTC Description Possible Cause Action U0416-68
Invalid Data Received From
Vehicle Dynamics Control
Module - event information
Event information brake
information Check Engine control module for stored DTCs. Check
CAN Bus Circuit for fault U0422-68
Invalid Data Received From
Body Control Module - event
information
Event information invalid
Power mode information Check Central junction box for stored DTCs. Check CAN
Bus Circuit for fault U101B-87
Lost Communication With
GSM - Multiple Bus-missing
message
Missing message lost
communication with
Transmission Shift
Module (multiple Bus) Check Transmission Shift Module for stored DTCs.
Refer to Circuit diagrams and check CAN and LIN Bus
for Circuit fault U3000-49
Control Module - internal
electronic failure
Internal electronic failure Suspect the Transmission control module. Install a
new Transmission control module as required, refer to
the new module/component installation note at the top of the DTC Index U3000-4B
Control Module - Circuit
resistance above threshold
Internal electronic failure Check and correct oil level. Check hydraulic flow
through oil cooler and pipe circuit for restriction or
blockage. If no restrictions found, suspect the
Transmission control module. Install a new
Transmission control module as required, refer to the
new module/component installation note at the top of
the DTC Index U3000-81
Control Module - invalid
serial data received
Vehicle or Engine type
signal incorrect from BCM
or incorrect Transmission
control module software
installed Reflash the Transmission control module using the
manufacturer approved process U3001-94
Control Module Improper
Shutdown - unexpected
operation
Control Module Improper
Shutdown (voltage
related) Check Engine control module For Power (generator)
faults. Check Power and Ground Circuit and Battery for
fault. Clear DTCs. Road Test. If DTC reoccurs suspect
the Transmission control module. Install a new
Transmission control module as required, refer to the
new module/component installation note at the top of
the DTC Index
