Evaporative Emissions System: Service Precautions

Fuel Cap Warning Message (with Multiinformation display)

The PCM detects whether the fuel fill cap is loose or missing under certain conditions and alerts the driver by showing the information in the multi-information display. If the PCM detects a small volume leak, the MIL may come on during the third drive cycle and store a DTC.




First drive cycle
During the first drive cycle after a cold start, the PCM alerts the driver to check the fuel fill cap by showing a ("TIGHTEN FUEL CAP" ('06-07 models)) message in the multi-information display (A), and it stores Temporary DTC P0457 "Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose or Missing". Tightening the fuel cap does not make the message go off immediately.

To make the message go off(with the HDS)

Procedure
1. Tighten the fuel fill cap properly.
2. Clear the Temporary DTC with the HDS.
3. Verify there is no leak by doing the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

To make the message go off (without the HDS)

Procedure
1. Tighten the fuel fill cap properly.
2. Turn the ignition switch OFF.
3. Start the engine, and drive at a steady speed over 28 mph(45 km/h), without moving the accelerator pedal, for about 1 minute. Do this several times.

Second drive cycle
During the second drive cycle after a cold start, if the fuel fill cap is still loose or missing, the PCM alerts the driver to check the fuel fill cap by showing a ("TIGHTEN FUEL CAP" ('06-07 models)) message in the multi-information display as same as the first drive cycle. Tightening the fuel cap does not make the message go off immediately.




Third drive cycle
During the third drive cycle after a cold start, if the fuel fill cap is still loose or missing, the PCM stores DTC P0457 "Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose or Missing". The malfunction indicator lamp (MIL) (A) comes on, and the ("TIGHTEN FUEL CAP" ('06-07 models)) message goes off.