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Home >> Mazda >> 2007 >> RX-8 Touring, 1.3 3 >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic (Engine Control System) 13BMSP >> DTC P0455 >> Diagnostic procedure
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Diagnostic procedure

DTC P0455 DIAGNOSTIC PROCEDURE CHART

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED 
  • Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (EVAP system related) been recorded?
 Yes Go to the next step.
No Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY RELATED PENDING CODE OR STORED DTC 
  • Turn the ignition switch off, then to the ON position (Engine off).
  • Verify the related PENDING CODE or stored DTCs.
  • Are other DTCs present?
 Yes Go to the appropriate DTC inspection. (See DTC TABLE ).
No Go to the next step.
4 CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN 
 Yes Go to the next step.
No Intermittent concern exists. Perform the INTERMITTENT CONCERN TROUBLESHOOTING .
5 INSPECT FUEL-FILLER CAP 
  • Verify the fuel-filler cap is not disconnected, loose or damaged.
  • Is it normal?
    NOTE:
    • When fuel-filler caps other than OEM caps are attached, it is considered a malfunction. 
 Yes Go to the next step.
No Tighten the fuel-filler cap, then go to Step 17.
6 INSPECT PURGE SOLENOID VALVE 
 Yes Replace the purge solenoid valve, then go to Step 17. (See INTAKE-AIR SYSTEM HOSE ROUTING DIAGRAM. )
No Go to the next step.
7 INSPECT CHANGE OVER VALVE (IN EVAP SYSTEM LEAK DETECTION PUMP) 
 Yes Replace the EVAP system leak detection pump, then go to Step 17. (See EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM REMOVAL/INSTALLATION )
No Go to the next step.
8 INSPECT EVAP SYSTEM 
 Yes Repair or replace the malfunctioning part, then go to Step 17.
No Go to the next step.
9 INSPECT EVAP LEAKAGE FROM FUEL PUMP TO CHARCOAL CANISTER 
  • Disconnect the fuel tank side vacuum hose at charcoal canister.
  • Apply the vacuum 1.7 kPa {13 mmHg, 0.5 inHg}  to the disconnected vacuum hose using the vacuum pump.
  • Does vacuum hold for minimum of 2 min?
 Yes Go to Step 13.
No Go to the next step.
10 INSPECT VACUUM HOSE FOR POOR CONNECTION 
  • Inspect the vacuum hose installation condition between fuel tank and charcoal canister.
  • Is it normal?
 Yes Go to the next step.
No Connect the vacuum hose correctly, then go to Step 17. (See INTAKE-AIR SYSTEM HOSE ROUTING DIAGRAM. )
11 INSPECT INSTALLATION OF FUEL PUMP UNIT 
  • Remove fuel tank.
  • Inspect the fuel pump unit for damage, insufficient, or poor sealing.
  • Is it normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning part, then go to Step 17.
12 INSPECT FUEL TANK 
 Yes Replace the fuel tank, then go to Step 17. (See FUEL TANK REMOVAL/INSTALLATION )
No Go to the next step.
13 INSPECT EVAP LEAKAGE FROM CHARCOAL CANISTER TO PURGE SOLENOID VALVE 
  • Disconnect the purge solenoid valve side vacuum hose at the charcoal canister.
  • Apply the vacuum 3.3 kPa {25 mmHg, 1.0 inHg}  to the disconnected vacuum hose using the vacuum pump.
  • Does the vacuum hold for minimum of 2 min? 
 Yes Go to Step 17.
No Go to the next step.
14 INSPECT VACUUM HOSE FOR POOR CONNECTION 
  • Inspect the vacuum hose installation condition between charcoal canister and purge solenoid valve.
  • Is it normal?
 Yes Go to the next step.
No Connect the vacuum hose correctly, then go to Step 17. (See INTAKE-AIR SYSTEM HOSE ROUTING DIAGRAM. )
15 INSPECT CATCH TANK 
 Yes Replace the catch tank, then go to Step 17. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION )
No Go to the next step.
16 INSPECT CHARCOAL CANISTER 
 Yes Replace the charcoal canister, then go to the next step. (See EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM REMOVAL/INSTALLATION )
No Go to the next step.
17 VERIFY TROUBLESHOOTING OF DTC P0455 COMPLETED 
 Yes Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION )
No Go to the next step.
18 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection. (See DTC TABLE ).
No DTC troubleshooting completed.
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