DTC Troubleshooting: P04F0(2.0L Engine): Inspection

EVAP Canister Purge Line Inspection 

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).
  • Disconnect the EVAP canister purge line (C) from the EVAP canister (D). Connect the T-fitting (E), the vacuum/pressure gauge, 0-4 inHg (F), and the vacuum pump/gauge, 0-30 inHg (G), to the EVAP canister purge line as shown.
  • Slowly apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.

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

• Normal Conditions
• • EVAP canister purge line does not hold vacuum.

Results 

• If it is abnormal, there is a problem with the parts on the EVAP canister purge line.

Purge Tube B Visual Inspection 

Test Procedure 

• Procedure
• • Check for a poor connection, a blockage, or damage at purge tube B between the EVAP canister purge nozzle and the EVAP canister purge valve.

• Normal Conditions
• • Conditions at the connections are OK, and there is no damages.

Results 

• If it is abnormal, there is a problem with purge tube B.

Purge Tube B Inspection 

Test Procedure 

• Procedure
• • Disconnect purge tube B from the EVAP canister purge nozzle (A), and connect the vacuum pump/gauge, 0-30 inHg (C), to the tube as shown.
  • Select the HDS [PCS(CPV) ON].
  • Apply vacuum to the tube.

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

• Normal Conditions
• • Purge tube B does not hold vacuum.

Results 

• If it is abnormal, there is a problem with purge tube B between the EVAP canister purge nozzle and the EVAP canister purge valve.

Purge Tube D Visual Inspection 

Test Procedure 

• Procedure
• • Check for a poor connection, a blockage, or damage at the purge tube D between the EVAP canister purge nozzle and intake air duct E.

• Normal Conditions
• • -

    Conditions at the connections are OK, and there is no blockages or damages.

Results 

• If it is abnormal, there is a problem with purge tube D.

Purge Tube D Inspection 

Test Procedure 

• Procedure
• • Disconnect purge tube D from the throttle body inlet pipe (A), and connect the vacuum pump/gauge, 0-30 inHg (B), to purge tube D as shown.
  • Apply vacuum to the tube.

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

• Normal Conditions
• • Purge tube D does not hold vacuum.

Results 

• If it is abnormal, there is a problem with purge tube D between the throttle body inlet pipe and the EVAP canister purge nozzle.

Throttle Body Inlet Pipe Port Inspection 

Test Procedure 

• Preparation
• • Purge tube D: disconnected from the throttle body inlet pipe
• Procedure
• • Check for debris or clogs in the throttle body inlet pipe port (A).

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

• Normal Conditions
• • There is no debris or clogs.

Results 

• If it is abnormal, there is a problem with the throttle body inlet pipe port.

EVAP Canister Purge Nozzle Port Inspection 

Test Procedure 

• Preparation
• • Purge tube B: disconnected from the EVAP canister purge nozzle
• Procedure
• • Check for debris or clogs in the EVAP canister purge nozzle port (A).

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

• Normal Conditions
• • There is no debris or clogs.

Results 

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

EVAP Canister Purge Nozzle Inspection 

Test Procedure 

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

Results 

• There is a problem with the EVAP canister purge nozzle.