Instruments - 'CHECK FUEL CAP' Message

SOURCE: Honda Service News

TITLE: CHECK FUEL CAP Message in Odometer Display or MID

APPLIES TO: 05 Accord
05 CR-V
05 Element
05 Odyssey
05 Pilot
06 Ridgeline

SERVICE TIP:

Got a vehicle on your shop with a CHECK FUEL CAP message in the odometer display, or in some models, the MID?

The ECM/PCM does several different EVAP system function tests. These tests require at least two failed tests (two trips) to turn on the MIL and set a permanent DTC. These tests detect EVAP system leaks like those caused by a loose or missing fuel fill cap. Due to this, we've added the CHECK FUEL CAP message.

The CHECK FUEL CAP message comes on when the EVAP monitor detects a leak the first time (one trip). The message goes off when the EVAP monitor runs again. If the monitor didn't detect a leak, the CHECK FUEL CAP message goes off and the MIL stays off. If the monitor detects a leak again, the CHECK FUEL CAP message goes off, the MIL comes on, and a permanent DTC is set.

If your customer brings the vehicle in with the CHECK FUEL CAP message on, tighten the fuel fill cap, use the HDS to clear the temporary DTC to turn off the message, then do the EVAP system function test to make sure there's no leak.