Code PO 455
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
From the service manual:
DTC P0455
The control module tests the Evaporative Emission (EVAP) System for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets.
DTC P0455
The control module tests the Evaporative Emission (EVAP) System for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets.
Thread Starter
Pro
Joined: Mar 2007
Posts: 507
Likes: 5
From: Macungie Pa
Thanks Mark......took the car back to work after I reset the code and all seems fine. I put fuel in the other day after I ran it almost empty.
If it happens again, I'll know where to start.
Thanks again......
If it happens again, I'll know where to start.
Thanks again......
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
You probably won't know if the code is coming back until you drive it some. The code will only set when the fuel level is between 15-85 percent.
Conditions for Running the DTC
1. The engine is running.
2. The ignition voltage is between 10-18 volts.
3. The barometric pressure (BARO) is more than 75 kPa.
4. The fuel level is between 15-85 percent.
5. The engine coolant temperature (ECT) is between 4-30°C (39-86°F).
6. The intake air temperature (IAT) is between 4-30°C (39-86°F).
7. The start-up ECT and IAT are within 9°C (16°F) of each other.
8. The vehicle speed sensor (VSS) is less than 121 km/h (75 mph).
The first thing I would check is the fuel cap gasket.
Conditions for Running the DTC
1. The engine is running.
2. The ignition voltage is between 10-18 volts.
3. The barometric pressure (BARO) is more than 75 kPa.
4. The fuel level is between 15-85 percent.
5. The engine coolant temperature (ECT) is between 4-30°C (39-86°F).
6. The intake air temperature (IAT) is between 4-30°C (39-86°F).
7. The start-up ECT and IAT are within 9°C (16°F) of each other.
8. The vehicle speed sensor (VSS) is less than 121 km/h (75 mph).
The first thing I would check is the fuel cap gasket.
Just added fuel and now a P0455 = Loose fuel cap
