DTC P04F0-9C: Evaporative Emission System High Load Purge Line "A" Performance Low/Insufficient Flow [09/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
A high load purge line is installed upstream from the turbo to process evaporated fuel vapor during boost operation.
The pressure on the high load purge line is monitored to detect that a hose is detached or clogged.
| *1 | Purge VSV (with Check Valve) | *2 | Air Cleaner Hose Assembly (Ejector) |
| *3 | Purge Pressure Sensor (vacuum sensor assembly) |
*4 | Air Cleaner |
| *5 | Air Tube Assembly | *6 | Intake Manifold |
| *7 | Manifold Absolute Pressure Sensor (No. 1 Turbo Pressure Sensor) |
*8 | ECM (Atmospheric Pressure Sensor) |
| *9 | from Canister | *10 | to Engine |
| *a | EVAP Purge Flow | *b | Purge Flow During Boost |
| *c | Purge Flow When Non Boost | - | - |
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| P04F0-9C | Evaporative Emission System High Load Purge Line "A" Performance Low/Insufficient Flow | Pressure pulsation during purge VSV operation in the boost range is less than the threshold value (2 trip detection logic). |
|
Comes on | Engine | B |
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