|
DTC Advanced Diagnostics: P00FE
DTC P00FE:Evaporative Emission (EVAP) Vent Line Blockage
General Description
The powertrain control module (PCM) detects a blockage on the vent line by two phases:
|
|
Phase 1
The PCM detects a blockage of vent line by estimating a space volume of the evaporative emission (EVAP) system from the pressure behavior when the EVAP canister vent shut valve is closed and decompressed by purging. If the space volume is large, the PCM defines as normal. If the space volume is small, the detection moves to phase 2. |
|
|
Phase 2
If abnormality is found in phase 1, the PCM stops purging and seals the space of the EVAP system. Phase 2 is done until the timing when the vehicle is stopped that is to stabilize the fuel surface. If the gradient of the pressure change is small, the PCM detects a malfunction and stores a DTC. |
Monitor Execution, Sequence, Duration, DTC Type
|
Execution |
Once per driving cycle |
|
Sequence |
None |
|
Duration |
0.2 second or more, but not more than an hour |
|
DTC Type |
Two drive cycles, MIL on | |
|
Enable Conditions
Phase 1
|
Condition |
Minimum |
Maximum |
|
Soak duration* |
6 hours |
– |
|
Elapsed time after the vehicle condition is turned to the ON mode |
1 second |
– |
|
Outside air temperature |
40.0°F (4.4 °C) |
– |
|
Engine coolant temperature [ECT Sensor]** |
131 °F (55 °C) |
– |
|
Engine coolant temperature (at radiator) after soak* |
40.0 °F (4.4 °C) |
– |
|
Engine coolant temperature (at engine) lowering from after soak to current* |
– |
9 °F (5 °C) |
|
Engine coolant temperature (at radiator) lowering from after soak to current* |
– |
3 °F (2 °C) |
|
Fuel tank pressure before EVAP canister vent shut valve closed |
-1.3 kPa (-10 mmHg, -0.3 inHg) |
– |
|
Vehicle speed [VEHICLE SPEED] |
26 mph (41 km/h) |
– |
|
Drive distance after refueling |
7 miles (10 km) |
– |
|
12 volt battery voltage [BATTERY] |
10.5 V |
– |
|
Total intake air amount*1 |
120 g (4.24 oz) |
– |
|
Total intake air amount*2 |
190 g (6.71 oz) |
– |
|
Total intake air amount*3 |
192 g (6.78 oz) |
– |
|
Intake air amount |
0.010 g/second (0.00036 oz/second) |
– |
|
Average fuel level |
– |
85 % |
|
Purge duty [PCS duty]*** |
20 % |
– |
|
Fuel feedback |
Other than during fuel cut-off operation | |
|
|
Phase 2
|
Condition |
Minimum |
Maximum |
|
12 volt battery voltage [BATTERY] |
10.5 V |
– | |
|
Malfunction Threshold
|
|
Phase 1
The space volume of EVAP system is 5.6 L (1.47 US gal) or less. |
|
|
Phase 2
The pressure deviation is 0.3997 kPa/second (2.997 mmHg/second, 0.11803 inHg/second). |
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.
|
|
EVAP vent line blockage |
|
|
Vent shut float blockage |
Confirmation Procedure
Operating Condition
|
1. |
Start the engine. Hold the engine speed [Engine Speed] at 3,000 rpm without load (in P or N) until the radiator fan comes on. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode and leave the vehicle for at least 6 hours. |
|
3. |
Start the engine. Hold the engine speed [Engine Speed] at 3,000 rpm without load (in P or N) until the radiator fan comes on. |
|
4. |
Let it idle for at least 5 minutes 45 seconds. |
|
5. |
Drive the vehicle at 25 mph (40 km/h) or more with avoidance of high load. |
|
6. |
Stop the vehicle and leave for at least 0.2 second. |
|
|
When you have difficulty duplicating the DTC because of road conditions and traffic situations, repeat the driving pattern several times. |
|
|
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow. |
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. | 