DTC P0457-00: EVAP System Leak Detected (Fuel Cap Loose/Off): Notes
DTC P0457:00 DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0457:00 |
EVAP system leak detected (fuel cap loose/off) |
| DETECTION CONDITION |
- P0457:00 indicates that the initial vacuum could not be achieved after a refueling event and the purge vapor flow is excessive (gross leak).
Diagnostic support note
- This is an intermittent monitor (EVAP system).
- A check fuel cap warning light will be illuminated after a malfunction has been detected on one driving cycle. The check fuel cap warning light will be extinguished after the monitor has run without a malfunction (same or subsequent drive cycle).
- The check engine light will be illuminated after a malfunction has been detected on three consecutive driving cycles. The check engine light will be extinguished after three consecutive driving cycles where the monitor was run without a malfunction.
- PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
- The DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- |
| POSSIBLE CAUSE |
- Missing or loose fuel filler cap
- PCM malfunction
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| SYSTEM WIRING DIAGRAM |
- |