DTC P04DF: Inspection

EVAP Canister Purge Valve Inspection (Open Stuck) 

Test Procedure 

• Procedure
  • Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B) in the engine compartment, then connect a vacuum pump/gauge, 0-30 inHg (C), to the EVAP canister purge valve as shown.
  • Apply vacuum to the EVAP canister purge valve.

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

• Normal Conditions
  • EVAP canister purge valve holds vacuum for 1 minute.

Results 

• If it is abnormal, there is a problem with the EVAP canister purge valve.

FTP Sensor Inspection 

Test Procedure 

• If the other inspection item(s) indicated a normal condition, then it is determined that the remaining FTP sensor is the cause.

Results 

• There is a problem with the FTP sensor.