Test J: The Check Fuel Cap Indicator Is Never on

PINPOINT TEST J: THE CHECK FUEL CAP INDICATOR IS NEVER ON

J1-J3:

J4:

Normal Operation
The powertrain control module (PCM) monitors the fuel tank evaporative emission system for significant leaks that occur following refueling of the vehicle. If a fuel tank pressure change greater than -23.7 kPa (7 in Hg) of vacuum within 30 seconds after refueling occurs, or there is an excessive purge (fuel vapor) flow of greater than 454 g (0.06 lb) per minute, the PCM sets DTC P0457 and sends a message to the instrument cluster over the communication network to illuminate the CHECK FUEL CAP indicator.

Possible Causes
- PCM
- instrument cluster