DTC Description
DTC DETECTION LOGIC
| DTC | CONSULT screen terms (Trouble diagnosis content) | DTC detection condition | |
| P0451 | Barometric pressure sensor A/B (EVAP System Pressure Sensor/Switch "A" Circuit Range/Performance | Diagnosis condition | Ignition switch ON |
| Signal (terminal) | EVAP control system pressure sensor signal | ||
| Threshold | ECM detects a state that the pressure difference remains the threshold value or more for continuously for 5 seconds or more under the condition that the pressure of the EVAP control system pressure sensor and that of the Barometric pressure sensor are equal. | ||
| Diagnosis delay time | 3 seconds or more | ||
POSSIBLE CAUSE
- EVAP control system pressure sensor
- Barometric pressure sensor (built into ECM)
- Clogging, crushing, or damage in hose or piping.
FAIL-SAFE
Not applicable