2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1368
* The above conditions are met for greater than 30 s
* DTC P0455 or DTC P0497 will attempt to run up to 10 times or until the test completes successfully once per ignition cycle.
Conditions for Setting the DTC
* The ECM detects the EVAP system is not able to achieve or maintain vacuum during the diagnostic test. This condition can be the result of a
large leak or a restriction in the EVAP system.
* The condition exists for greater than 4 s or for a cumulative of 30 s.
Action Taken When the DTC Sets
DTCs P0455 and P0497 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0455 and P0497 are Type B DTCs.
Diagnostic Aids
* Inspect for a loose, missing, damaged, or incorrect fuel fill cap.
* Inspect for a damaged fuel filler neck seal surface.
* A blockage or restriction in the evaporative emission purge solenoid valve, purge pipe, evaporative emission canister, or vapor pipe, can
cause this DTC to set.
* The evaporative emission system can be filled with smoke more quickly and completely by opening the system opposite the end where the
smoke is injected. Close the system once smoke is observed.
* To help locate intermittent leaks using the J 41413-200 - EEST , move all evaporative emission components while observing smoke with the
J 41413-SPT - White Light.
* Individual components can be isolated and tested using adapters in the J 41413-300 - Kit.
* A condition may exist where a leak in the evaporative emission system only exists under a vacuum condition. This type of leak may be
detected by using the scan tool Purge/Seal function to create a vacuum in the evaporative emission system and then observe the fuel tank
pressure parameter for vacuum decay.
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Evaporative Emission Control System Description (See: Powertrain Management/Computers and Control Systems/Description and
Operation/Evaporative Emission Control System Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information
Special Tools
* CH 48096 - Evaporative Emissions Service Access Port Tool
* CH 41415-50 - Fuel Tank Adapter
* J 41413-200 - Evaporative Emissions System Tester (EEST)
* J 41413-300 - Evaporative Emissions Cap and Plug Kit
* J 41413-311 - Evaporative Emissions Plug
* J 41413-SPT - High Intensity White Light
* J 41413-VLV - Evaporative Emissions Service Port Vent Tool
* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).
Circuit/System Testing
Note:
* Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
* Refer to the J 41413-200 - EEST operation manual for detailed instructions in Evaporative Emission System Diagnosis (See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Evaporative Emission
