ME9 / P0456 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
EVAP, Very Small Leakage in System
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The battery voltage must be over 11 V. |
| The fuel level is between 15% and 85%. |
| Engine temperature upon start is lower than 42°C. |
| The intake air temperature upon start is between 3.8 °C and 35 °C. |
| The difference between the engine and intake air temperature is lower than 6.8 °C. |
| Engine running for more than 600 s. |
| Atmospheric pressure more than 68 kPa. |
| Total distance covered more than 20 km when the control module is new. |
| Distance covered during this driving cycle more than 8100 m. |
| NONE of the following DTCs must be detected: |
| The diagnosis runs when the engine is shut off and the above conditions are met, plus when the ambient temperature is between 2 °C and 37 °C. |
| This diagnosis observes the pressure change in a closed tank up to 45 minutes (both valves closed). |
Fault criteria:
| An insufficient pressure change corresponds to a small leak, a hole of a diameter of 0.5 and greater. |
Diagnostic help
Diagnosis regards:
| A small leak of 0.5 and greater. |
| An improperly screwed fuel cap is often the reason this diagnostic trouble code is generated. Before beginning fault diagnosis, check that the tank cap is properly fitted. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
