Fuel Cap Caution

Fuel Cap Caution

The ECM/PCM detects when the fuel fill cap is loose or missing under a specific condition and notifies the driver.




First drive cycle
In the first drive cycle, involving a cold start, the ECM/PCM stores a temporary DTC P0457 "Evaporative Emission (EVAP) System Leak Detected/Fuel Cap Loose or Missing" if the fuel fill cap is loose or missing, but no indicator will come on, and no message will be shown in the Multi-Information Display (A).




Second drive cycle
In the second drive cycle, involving a cold start, if the fuel fill cap is still loose or missing, the ECM/PCM notifies the driver to check the fuel fill cap by showing the message, "CHECK FUEL CAP" in the Multi- Information Display. Tightening the fuel fill cap properly will not make the message go off immediately.

To make the message go off
Tighten the fuel fill cap properly (three clicks), and do this procedure several times.

1. Turn the ignition switch OFF.
2. Start the engine, and drive the vehicle at a steady speed over 28 mph (45 km/h) without moving the accelerator pedal for about 1 minute.




Third drive cycle
In the third drive cycle, involving a cold start, if the fuel fill cap is still loose or missing, the ECM/PCM stores DTC P0457 "Evaporative Emission (EVAP) System Leak Detected/Fuel Cap Loose or Missing" and indicates the malfunction indicator lamp (MIL) (A) comes on.
At this time, the message "CHECK FUEL CAP" will go off from the Multi-Information Display (B)