DTC P04CD

DTC P04CD: Fuel Fill Door Opener Switch Circuit On Stuck

General Description

Courtesy of HONDA, U.S.A., INC.

The fuel fill door opener switch is a momentary switch used to manually open the fuel lid. Turning the fuel fill door opener switch on causes high (+B) to be input to the powertrain control module (PCM) and turning off the switch causes 0 V (open) to be input. The PCM detects a malfunction and stores a DTC when on signal is received continuously for the prescribed time or more as the input signal to the fuel fill door opener switch.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	30 minutes or more
DTC Type	Two drive cycles, MIL on

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage	10 V	-

Malfunction Threshold

When on signal from the fuel fill door opener switch is received continuously for 30 minutes or more, or in the vehicle off (lock) mode, when the PCM continued self-holding of the power source by the main relay for 30 minutes or more.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

Fuel fill door opener switch FUEL REQ SW line short to power
Fuel fill door opener switch stuck on
PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.