DTC Troubleshooting: P04DF(2.0L Engine): Inspection

EVAP Canister Purge Valve Functional Inspection (Open Stuck) 

Test Procedure 

• Preparation
• • EVAP canister purge valve: removed with its connector and vacuum hose connected
• Procedure
• • Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B) in the engine compartment, then connect a T-fitting (C), the vacuum/pressure gauge, 0-4 inHg (D), and a vacuum pump/gauge, 0-30 inHg (E), to the vacuum hose as shown.
  • Slowly apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.

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

• Normal Conditions
• • EVAP canister purge valve holds vacuum.

Results 

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

EVAP Canister Vent Shut Valve Inspection 

Test Procedure 

• If the other inspection item(s) indicated a normal condition, then it is determined that the remaining EVAP canister vent shut valve is the cause.

Results 

• There is a problem with the EVAP canister vent shut valve.