DTC P2420
DTC P2420: Fuel Vapor Containment Valve Control Circuit High Voltage
General Description
The fuel vapor containment valve is installed between the fuel tank and the purge passage to be used to shut off the fuel tank from the purge passage except when refueling to create a sealed condition. The fuel vapor containment valve is normally sealed. The powertrain control module (PCM) detects a malfunction and stores a DTC when close signal is returned continuously for the prescribed number of times though open signal is output to the fuel vapor containment valve.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | Two drive cycles, MIL on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery] | 10 V | - |
[ ]: HDS Parameter
Malfunction Threshold
When the closed signal is returned continuously for 200 times though open signal is output to the fuel vapor containment valve.
Possible Cause
- Fuel vapor containment valve FTCV- line short to power
- Fuel vapor containment valve internal failure
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
Turn the vehicle to the ON mode.
With the HDS
Do the EVAP TEST FUEL VAPOR CONTAINMENT VALVE (FTCV) in the INSPECTION MENU with the HDS.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.