Test H: The Check Fuel Cap Warning Indicator Is Never/Always On

PINPOINT TEST H: THE CHECK FUEL CAP WARNING INDICATOR IS NEVER/ALWAYS ON

H1-H4:

Normal Operation
The powertrain control module (PCM) monitors the fuel tank evaporative emission system for significant leaks that occur following refueling of the vehicle. The PCM sends a message to the instrument cluster over the controller area network (CAN) to illuminate the check fuel cap warning indicator.

Possible Causes
- PCM
- Instrument cluster