DTC Advanced Diagnostics: P24C0
DTC P24C0:Canister Change Over Valve Close Malfunction

General Description

Relative pressure calculated from evap leak check module the pressure sensor is smaller than the failure determination value, if the state has continued for a predetermined time, the powertrain control module (PCM) detects a malfunction and stores a DTC.

Relative pressure which is calculated from the pressure sensor in the ELCM failure determination value or more, the integrated purge flow rate reaches a predetermined amount, properly determined.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Once per driving cycle
Sequence
None
Duration
–
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
Minimum
Maximum
Low load duration time
1 seconds
–
Engine coolant temperature [ECT SENSOR 1] before EVAP purge control starts
131 °F (55 °C)
–
Evap leak check module pressure sensor
-4.4 kPa (-33.6 mmHg, -1.2 inHg)
–
12 volt battery voltage [BATTERY]
10.5 V
–
[ ]: HDS Parameter

Malfunction Threshold
The evap leak check module pressure sensor in the 1 second or more the pressure reduction is -4.4 kPa (-33.6 mmHg, -1.2 inHg) or less.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Control valve failure
Dust filter closed

Confirmation Procedure
Operating Condition
1.
Let it engine idle until the radiator fan comes on.
2.
Drive immediately at a steady speed between 30 - 75 mph (48 - 120 km/h).
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
With the HDS
None.

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.