* The TCM internal temperature has changed by less than 2.0锟斤拷C (3.6锟斤拷F) in 2 minutes.
* The transmission fluid temperature (TFT) is greater than 70锟斤拷C (158锟斤拷F).
* The TFT has increased by 55锟斤拷C (99锟斤拷F) since startup.
Condition 2
* Vehicle speed is 8 km/h (5 mph) or greater for 5 minutes.
* TCC slip speed is greater than 120 RPM for 5 minutes.
* The TCM internal temperature is between 120-150锟斤拷C (248-302锟斤拷F).
* The TCM internal temperature has changed by less than 2.0锟斤拷C (3.6锟斤拷F) in 2 minutes.
* The TFT is 70锟斤拷C (158锟斤拷F) or greater.
* The TFT has increased by 55锟斤拷C (99锟斤拷F) since startup.
Condition 3
The TCM internal temperature changes by 20锟斤拷C (36锟斤拷F) or greater 14 times over 7 seconds.
P0668
The TCM internal temperature is 249锟斤拷C (480锟斤拷F) or greater for 4 seconds or more.
P0669
The TCM internal temperature is -249锟斤拷C (-416锟斤拷F) or greater for 4 seconds or more.
Action Taken When the DTC Sets
* DTCs P0667, P0668, and P0669 are Type C DTCs.
* The TCM allows the vehicle to operate in transmission protection mode.
Conditions for Clearing the DTC
DTCs P0667, P0668, and P0669 are Type C DTCs.
Diagnostic Aids
During a road test, the TCM temperature should steadily increase to a normal operating temperature, and then stabilize.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Connector End View Reference
* Component Connector End Views (See: Diagrams/Connector Views)
* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Description and Operation
* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)
* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)
* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
