My 2005 limited crossfire has developed a flashing fuel light and check engine p0455, intermittent problem, I have read the posts and there is no clear conclusion as to what are the findings,causes and resolutions. My dealer is considering changing the instrument cluster, with 5 visits under my belt I am frustrated and I don't think this has anything to do with it... Can any one please let me learn from you experience, lead to in the right direction. Thanks.

 

Obviously, you have a defective Dealer Service Department. I think you will need a new one.

Good Luck with that.

 

If you go to the TECHNICAL AND MODIFICATION section of this forum the very first thread is a list of DTC codes where you can find what p00455 means. I checked it out and it seems it has something to do with a leak in the evap system.

 

I have seen this before. Bad fuel cap, charcoal canister and or check valve. It will be one of those three most likely. Test the cap and the check valve first they are cheaper then the canister... This can also happen by over filling your fuel tank. Trust me stop at the click.

 

Hope this helps - from Alldata DIY.

(P0455) EVAP SYSTEM LARGE LEAK

When Monitored and Set Condition

• When Monitored: Engine Running. Cold start test. Fuel Level greater than 12%, ambient temperature between 4°C and 32°C (39°F and 89°F) , closed loop system operation. Test runs when small leak test is maturing.
• Set Condition: The PCM activates the EVAP Purge Solenoid to pull the EVAP system into a vacuum. The PCM turns the EVAP Purge solenoid off to seal the EVAP system. If the fuel tank pressure sensor reads normal operating pressure sooner than expected, a Large Leak error is detected.

POSSIBLE CAUSES

• EVAPORATIVE EMISSION SYSTEM LEAK
• FUEL TANK PRESSURE SENSOR

2. CHECK FOR CURRENT DTC


Note: Since a hot vehicle can conceal a leak, it is best to perform this test at room temperature.

Note: A loose fuel filler cap could have caused this DTC to set. Make sure fuel filler cap is tight and in good condition. Ensure the fuel filler cap meets OEM specifications.

Note: If the PCM detects and stores a DTC, the PCM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the DRBIII at the same time the DTC is displayed.


3. VISUAL AND PHYSICAL INSPECTION
Turn the ignition off. Perform a visual and physical inspection of the entire Evaporative Emission system.

Check for the follow conditions:

• Holes or cracks
• Loose seal points
• Evidence of damaged components
• Incorrect routing of hoses and tubes
• Fuel Filler Cap gasket seal Were any of the above conditions found?

Note: The fuel tank should have between 20% and 80% of fuel tank capacity to properly test the Evap system. To continue testing you will need Special Tool #8404 Evaporative Emission Leak Detector (EELD). Connect the red power lead of the EELD to the battery positive terminal and the black ground lead to battery negative terminal.

Block the vent hose of the EVAP Canister. Connect shop air to the EELD.

Set the smoke/air control switch to AIR. Insert the tester's AIR supply tip (clear hose) into the appropriate calibration orifice on the tester's control panel (based on DTC leak size). Press the remote smoke/air start button. Position the red flag on the air flow meter so it is aligned with the indicator ball. When the calibration is complete, release the remote button. The EELD is now calibrated the flow meter in liters per minute to the size leak indicated by the DTC set in the PCM. Install the service port adapter (Special Tool #8404-14) on the vehicle's service port. Connect the Air supply hose from the EELD to the service port. Press the remote button to activate AIR flow.

Note: Larger volume fuel tanks, lower fuel levels or if the vehicle is equipped with a Flow Management Valve may indicate high flow and will require 4 to 5 minutes to fill. Compare the flow meter indicator ball reading to the red flag. ABOVE the red flag indicates a leak present. BELOW the red flag indicates a sealed system.

5. EVAPORATIVE EMISSION LEAK DETECTION

Note: A thorough visual inspection of the Evap system hoses, tubes, and connections may save time in your diagnosis. Look for any physical damage or signs of wetness at connections. The strong smell of fuel vapors may aid diagnosis also.

Remove the Air supply hose from the vehicle's service port.
Connect the SMOKE supply tip (black hose) to the vehicle's service port. Set the smoke/air control switch to SMOKE.

Note: The flow meter indicator ball will not move in the smoke mode.

Press the remote smoke/air start button.

Note: Ensure that smoke has filled the EVAP system by continuing to press the remote smoke/air start button, remove the vehicle's fuel filler cap and wait for the smoke to exit. Once smoke is indicated, reinstall the fuel filler cap.

Note: For optimal performance, introduce smoke into the system for an additional 60 seconds; continue introducing smoke at 15 second intervals as necessary.
While still holding the remote smoke/air start button, use the white light (Special Tool #8404-CLL) to follow the EVAP system path and look for the source of the leak indicated by exiting smoke.
If a leak is concealed from view (i.e., top of fuel tank), release the remote smoke/air start button and use the ultraviolet (UV) black light #8404-UVL and the yellow goggles #8404-20 to look for residual traces of dye that are left behind by the smoke.
The exiting smoke deposits a residual fluid that is either bright green or bright yellow in color when viewed with a UV light.

Note: Carefully inspect the vent side of the EVAP Canister. Due to the filtering system in the canister the smoke may not be as thick. Introducing smoke into the filtered side of the canister may assist in locating the leak.
Was a leak found?
Yes >> Repair or replace the leaking component as necessary Perform POWERTRAIN VERIFICATION TEST - VER 2 See: Verification Tests\Powertrain Verification Test Ver - 2.
No >> Go To 6

6. EVAP PURGE SOLENOID OPERATION

Note: After disconnecting the Evap Purge Solenoid vapor hose connections, inspect the lines and solenoid for any signs of contamination from the EVAP Canister. This may indicate a faulty rollover valve. Replace/ repair as necessary.
With the ignition off.
Disconnect the vacuum hoses at the Evap Purge Solenoid.
Using a hand vacuum pump, apply 330 mm Hg (10 inHg) to the canister side of the EVAP Purge Solenoid.


7. FUEL TANK PRESSURE SENSOR OPERATION

Note: The fuel level must be below 85%, or the Tank Vent/Rollover Valves and the Fuel Tank Overfill Check Valve will seal the tank. Turn the ignition off. Install the fuel filler cap adapter. Attach the fuel filler cap to the adapter. Connect a hand-held vacuum pump to the fuel filler cap adapter. Slowly apply vacuum while monitoring the fuel tank pressure sensor on the DRB 1119. Do not exceed 66 mm Hg (2 inHg) while performing this step.

Note: A loose fuel filler cap could have caused this DTC to set. Make sure fuel filler cap is tight and in good condition. Ensure the fuel filler cap meets OEM specifications. Perform a visual and physical inspection of the entire Evaporative Emission system. Check for the following conditions: - Holes or cracks - Loose seal points - Evidence of damaged components - Incorrect routing of hoses and tubes - Fuel filler cap gasket seal
Were any of the above conditions found?