GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2007 🢒 VUE - AWD 🢒 DTC 🢒 DTC P0455

System Description

The Evaporative Emission (EVAP) System is used to store fuel vapors to reduce the amount of unburned fuel from escaping into the atmosphere. The EVAP system consists of the EVAP canister, the fuel tank pressure (FTP) sensor, the EVAP lines and hoses, the EVAP canister purge solenoid valve which is normally closed, the EVAP service port, the EVAP canister vent solenoid valve which is normally open, the fuel tank, and the engine control module (ECM). The ECM monitors the EVAP system for circuit faults in the FTP sensor, the EVAP canister purge solenoid valve and the EVAP canister vent solenoid valve circuits. The ECM also monitors the EVAP system for small and large leaks. During the DTC P0455 diagnostic, the ECM monitors the FTP sensor for an atmospheric pressure reading when all of the DTC parameters have been met with the engine running. The ECM will then command the EVAP canister vent solenoid valve ON which is a closed valve, and command the EVAP canister purge solenoid valve to a fixed duty cycle. The ECM will let the pressure drop in the fuel tank for a certain length of time after which it will turn OFF the EVAP canister purge solenoid valve . DTC P0455 sets when a certain vacuum in the fuel tank could not be achieved due to a large leak or a lack of vacuum source.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0455 Evaporative Emissions (EVAP) System Large Leak

Conditions for Running the DTC
    • Before the ECM can report that DTC P0455 failed, DTCs P0446, P0449, P0452, P0453 and P0496 must run and pass.
    • DTCs P0068, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0125, P0128, P0130, P0131, P0132, P0133, P0134, P0135, P0220, P0452, P0453, P0502, P0601, P0602, P0604, P0606, P060D, P060E, P062F, P0641, P1133, P1516, P1621, P2101, P2120, P2125, P2135, P2138, P2176 are not set.
    • The system voltage is between 11-18 volts.
    • The EVAP canister vent solenoid valve is commanded ON, closed.
    • The EVAP canister purge solenoid valve is commanded ON, open.
    • The engine is running.
    • The fuel tank level is between 15-85 percent.
    • The barometric pressure (BARO) is more than 74 kPa.
    • The engine coolant temperature (ECT) and the intake air temperature (IAT) at engine startup are between 4-30°C (39-86°F).
    • The ECT and the IAT are within 8°C (15°F) of each other at engine start-up.
    • The throttle position (TP) angle is between 7-35 percent.
    • The vehicle speed is less than 137 km/h (85 mph).
    • The DTC P0455 diagnostic runs once per ignition cycle after the above conditions have been met.

Conditions For Setting the DTC
    • If the FTP voltage is less than 3.0 volts during the DTC P0455 diagnostic test indicating a vacuum cannot be pulled on the EVAP system, DTC P0455 will set.
    • The above condition exists for longer than 5 minutes and 30 seconds.

Action Taken When the DTC Sets
    • The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
    • The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTC
    • The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
    • A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
    • A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
    • Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
    • The ECM uses the FTP sensor to detect the amount of vacuum pulled on the EVAP system during the leak diagnostic tests. Ensure that the fuel pressure sensor is not skewed by verifying the FTP sensor on the scan tool is between 1.30-1.70 volts with the ignition ON and the fuel cap removed.
    • If DTC P0455 fails, a warm test will be performed and can only pass, not fail, a diagnostic test. The purpose of this test is to keep the malfunction indicator lamp (MIL) OFF during the initial test if the customer starts the vehicle with the fuel cap off.
    • Visually inspect for a large leak in the EVAP system. Locate the leak with the J 41413-200 (J 41413-100) Evaporative Emissions System Tester (EEST).
    • The following are possible causes of a large leak:
       - The fuel cap is missing, is incorrectly installed or is leaking.
       - The EVAP canister vent solenoid valve is stuck open.
       - The EVAP canister purge solenoid valve is stuck closed or is blocked.
       - The EVAP vent hose is loose or is damaged.
       - The EVAP canister is leaking.
       - The fuel sender assembly O-ring is leaking.
       - The fuel tank or filler neck is leaking.
       - A condition may exist where a leak in the EVAP system only exists under a vacuum condition. By using the scan tool Purge/Seal function to create a vacuum, seal the system and observe the fuel tank pressure (FTP) parameter for vacuum decay, this type of leak may be detected.

Step

Action

Values

Yes

No

Schematic Reference: Engine Controls Schematics Evaporative Emissions Hose Routing Diagram

Connector End View Reference: Engine Control Module Connector End Views or Engine Controls Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Inspect the evaporative emission (EVAP) system for the following conditions:
    2. • A loose, missing, or damaged service port schrader valve
    • A loose, incorrect, missing, or damaged fuel fill cap
    • A damaged EVAP canister purge solenoid valve
  2. Raise the vehicle on a hoist. Refer to Lifting and Jacking the Vehicle .
  3. Inspect the EVAP system for the following conditions:
    4. • Any disconnected, improperly routed, kinked, or damaged EVAP pipes and hoses
    • A damaged EVAP canister vent solenoid valve or EVAP canister

Did you find and correct the condition?

--

Go to Step 35

Go to Step 3

3

  1. Clear the DTCs with a scan tool.
  2. Command the EVAP canister purge solenoid valve to 50 percent and back to 0 percent with a scan tool.

Do you hear or feel a clicking from the EVAP canister purge solenoid valve when it is commanded to 50 percent?

--

Go to Step 4

Go to Step 5

4

Command the EVAP canister vent solenoid valve ON and OFF with the scan tool.

Do you hear or feel a click as the EVAP canister vent solenoid valve is commanded ON and OFF?

--

Go to Step 9

Go to Step 7

5
  1. Disconnect the EVAP canister purge solenoid valve .
  2. Turn ON the ignition, with the engine OFF.
  3. Connect a test lamp between the ignition 1 voltage circuit of the EVAP canister purge solenoid valve and a known good ground. Refer to Troubleshooting with a Test Lamp .

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 26

6
  1. Connect a test lamp between the ignition 1 voltage circuit of the EVAP canister purge solenoid valve and the control circuit of the EVAP canister purge solenoid valve. Refer to Circuit Testing .
  2. Command the EVAP canister purge solenoid valve to 50 percent and then to 0 percent with a scan tool.

Does the test lamp illuminate or pulsate when the EVAP canister purge solenoid valve is commanded to 50 percent and turn OFF when the EVAP canister purge solenoid valve is commanded to 0 percent?

--

Go to Step 21

Go to Step 19

7
  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the EVAP canister vent solenoid valve.
  3. Connect a test lamp between the ignition 1 voltage circuit of the EVAP canister vent solenoid valve and a known good ground. Refer to Troubleshooting with a Test Lamp .

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 27

8
  1. Connect a test lamp between the ignition 1 voltage circuit of the EVAP canister vent solenoid valve and the control circuit of the EVAP canister vent solenoid valve. Refer to Troubleshooting with a Test Lamp .
  2. Command the EVAP canister vent solenoid valve ON, with a scan tool.

Does the test lamp illuminate?

--

Go to Step 22

Go to Step 20

9

Important: Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.

  1. Turn the nitrogen/smoke valve to NITROGEN.
  2. Connect the nitrogen/smoke hose to the 0.5 mm (0.20 in) test orifice on the bottom-front of the J 41413-200 (J 41413-100) Evaporative Emissions System Tester (EEST).
  3. Use the remote switch to activate the J 41413-200 (J 41413-100).
  4. Align the red flag on the flow meter with the floating indicator. Use the remote switch to de-activate the J 41413-200 (J 41413-100).
  5. Remove the nitrogen/smoke hose from the test orifice and install the hose onto one of the following sources:
    6. • Connect the GE-41415-50 Fuel Tank Cap Adapter to the fuel fill pipe, and the nitrogen/smoke hose to the fuel cap adapter.
    • Connect the nitrogen/smoke hose to the EVAP service port.
  6. Turn ON the ignition, with the engine OFF.
  7. Command the EVAP canister vent solenoid valve closed with a scan tool.
  8. Use the remote switch to introduce nitrogen and fill the EVAP system until the floating stabilizes.
  9. Compare the flow meters stable floating indicator position to the red flag.

Is the floating indicator below the red flag?

--

Go to Step 12

Go to Step 10

10

Important: Ensure that the vehicle underbody temperature is similar to the ambient temperature and allow the surrounding air to stabilize before starting the diagnostic procedure. System flow will be less with higher temperatures.

  1. Turn ON the ignition, with the engine OFF.
  2. Command the EVAP canister vent solenoid valve closed with a scan tool.
  3. Turn the nitrogen/smoke valve on the J 41413-200 (J 41413-100) control panel to SMOKE.
  4. Use the remote switch to introduce smoke into the EVAP system.
  5. Use the J 41413-VLV EVAP Service Port Vent Fitting to open the EVAP service port.
  6. Remove the J 41413-VLV once smoke is observed.
  7. Continue to introduce smoke into the EVAP system for an additional 60 seconds.
  8. Inspect the entire EVAP system for exiting smoke with a High Intensity White Light.
  9. Continue to introduce smoke at 15 second intervals until the leak source has been located.

Did you locate and repair a leak source?

--

Go to Step 35

Go to Step 11

11

  1. Disconnect the GE-41415-50 from the fuel fill pipe.
  2. Install the fuel fill cap to the fuel fill pipe.
  3. Connect the J 41413-200 (J 41413-100) nitrogen/smoke supply hose to the EVAP service port.
  4. Use the remote switch to introduce smoke into the EVAP system.
  5. Inspect the entire EVAP system for exiting smoke with a High Intensity White Light.
  6. Continue to introduce smoke at 15 second intervals until the leak source has been located.

Did you locate and repair a leak source?

--

Go to Step 35

Go to Step 12

12
  1. Use the remote switch to stop introducing smoke.
  2. Install the nitrogen/smoke supply hose onto one of the following sources:
    3. • Connect GE-41415-50 to the fuel fill pipe, and the nitrogen/smoke hose to the fuel cap adapter.
    • Connect the nitrogen/smoke hose to the EVAP service port.
  3. Connect the vehicle fuel fill cap to the GE-41415-50 .
  4. Command the EVAP canister vent solenoid valve open with a scan tool.
  5. Observe the Fuel Tank Pressure Sensor parameter with a scan tool.

Is the scan tool Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Step 13

Go to Step 23

13
  1. Seal the EVAP system using the EVAP Purge/Seal function with a scan tool.
  2. Turn the nitrogen/smoke valve on the J 41413-200 (J 41413-100) control panel to NITROGEN.
  3. Use the J 41413-200 (J 41413-100) to pressurize the EVAP system to the first specified value.

Is the Fuel Tank Pressure Sensor parameter less than the second specified value?

10 in H2O

0.5 V

Go to Step 14

Go to Step 23

14
  1. Use the remote switch to stop introducing nitrogen into the EVAP system.
  2. Increase the EVAP canister purge solenoid valve to 100 percent.

Is the Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Diagnostic Aids

Go to Step 15

15

Disconnect the EVAP purge vacuum source from the EVAP canister purge solenoid valve.

Is the Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Step 25

Go to Step 16

16

Disconnect the EVAP purge pipe from the EVAP canister purge solenoid valve.

Is the Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Step 30

Go to Step 17

17

Disconnect the EVAP purge pipe at the EVAP canister.

Is the Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Step 28

Go to Step 18

18

Disconnect the EVAP vapor pipe at the EVAP canister.

Is the Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Step 32

Go to Step 29

19

Test the control circuit of the EVAP canister purge solenoid valve for an open or for a short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 35

Go to Step 24

20

Test the control circuit of the EVAP canister vent solenoid valve for an open or for a short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 35

Go to Step 24

21

Test for an intermittent and for a poor connection at the EVAP canister purge solenoid valve. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 35

Go to Step 30

22

Test for an intermittent and for a poor connection at the EVAP canister vent solenoid valve. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 35

Go to Step 31

23

Test for an intermittent and for a poor connection at the fuel tank pressure (FTP) sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 35

Go to Step 33

24

Test for an intermittent and for a poor connection at the control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 35

Go to Step 34

25

Repair the pinched or obstructed EVAP canister purge solenoid valve vacuum source.

Did you complete the repair?

--

Go to Step 35

--

26
  1. Repair the open or short to ground in the ignition 1 voltage circuit of the EVAP canister purge solenoid valve. Refer to Wiring Repairs .
  2. Replace the fuse as necessary.

Did you complete the repair?

--

Go to Step 35

--

27

Repair the open or short to ground in the ignition 1 voltage circuit of the EVAP canister vent solenoid valve. Refer to Wiring Repairs . Replace the fuse as necessary.

Did you complete the repair?

--

Go to Step 35

--

28

Repair the restriction in the EVAP purge pipe.

Did you complete the repair?

--

Go to Step 35

--

29

Repair the restriction in the EVAP vapor pipe.

Did you complete the repair?

--

Go to Step 35

--

30

Replace the EVAP canister purge solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .

Did you complete the replacement?

--

Go to Step 35

--

31

Replace the EVAP canister vent solenoid valve. Refer to Evaporative Emission Canister Vent Solenoid Valve Replacement .

Did you complete the replacement?

--

Go to Step 35

--

32

Replace the EVAP canister. Refer to Evaporative Emission Canister Replacement .

Did you complete the replacement?

--

Go to Step 35

--

33

Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement .

Did you complete the replacement?

--

Go to Step 35

--

34

Replace the engine control module (ECM). Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 35

--

35

Important: Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.

  1. Turn the nitrogen/smoke valve to NITROGEN.
  2. Connect the nitrogen/smoke hose to the 0.5 mm (0.20 in) test orifice on the bottom-front of the J 41413-200 (J 41413-100).
  3. Use the remote switch to activate the J 41413-200 (J 41413-100) .
  4. Align the red flag on the flow meter with the floating indicator. Use the remote switch to de-activate the J 41413-200 (J 41413-100) .
  5. Remove the nitrogen/smoke hose from the test orifice and install the hose onto one of the following sources:
    6. • Connect the GE-41415-50 to the fuel fill pipe, and the nitrogen/smoke hose to the fuel cap adapter.
    • Connect the nitrogen/smoke hose to the EVAP service port.
  6. Turn ON the ignition, with the engine OFF.
  7. Command the EVAP canister vent solenoid valve closed with a scan tool.
  8. Use the remote switch to introduce nitrogen and fill the EVAP system until the floating stabilizes.
  9. Compare the flow meters stable floating indicator position to the red flag.

Is the floating indicator below the red flag?

--

Go to Step 36

Go to Step 2

36
  1. Seal the EVAP system using the EVAP Purge/Seal function with a scan tool.
  2. Turn the nitrogen/smoke valve on the J 41413-200 (J 41413-100) control panel to NITROGEN.
  3. Use the J 41413-200 (J 41413-100) to pressurize the EVAP system to the first specified value.

Is the Fuel Tank Pressure Sensor parameter less than the second specified value?

10 in H2O

0.5 V

Go to Step 37

Go to Step 2

37
  1. Use the remote switch to stop introducing nitrogen into the EVAP system.
  2. Increase the EVAP canister purge solenoid valve to 100 percent.

Is the Fuel Tank Pressure Sensor parameter within the specified value?

1.30-1.70 V

Go to Step 38

Go to Step 2

38

Observe the Capture Info with a scan tool.

Are there any DTCs that have not been diagnosed?

--

Go to Diagnostic Trouble Code (DTC) List - Vehicle

System OK