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Home >> Mazda >> 2000 >> Protege DX, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.6L >> Diagnostic Trouble Code Tests >> DTC P0453: EVAP System, Pressure Sensor High Input >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Ensure FREEZE FRAME PID data has been recorded. Check service bulletins. Go to next step.
  2. Using scan tool, access PID/DATA MONITOR. Record PID data for FTP V. If data is more than 4.8 volts, go to next step. If data is 4.8 volts or less, problem is intermittent (not current).
  3. Turn ignition off. Inspect FTP harness connector. If no problem is found, go to next step. If problem is found, repair as necessary. go to step  8 .
  4. Check continuity between FTP sensor harness terminal "B" (Black/Red wire) and ground. If continuity is present, go to next step. If any problems are found, repair as necessary and go to step  8 .
  5. Turn ignition off. Disconnect fuel tank pressure sensor connector. Check continuity between FTP harness sensor terminal "A" (Red/Green wire) and terminal "C" (Light Green/Red wire). If continuity is not present, go to next step. If continuity is present, repair short circuit between fuel tank pressure sensor wiring. Go to step  8 .
  6. Disconnect PCM harness connector. Check continuity between terminal "A" on FTP sensor harness connector and PCM harness connector No. 2 terminal "A". If continuity exists, go to next step. If continuity does not exist, repair Red/Green wire and go to step  8 .
  7. Inspect PCM harness connector. If no problem is found, go to next step. If problem is found, repair as necessary. go to next step.
  8. Connect all connectors. Turn ignition on. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Using scan tool, access PID/DATA MONITOR. Check PID data for FTP V. FTP V should be .2-4.8 volts. Check for DTCs. If same DTC is pending, replace PCM. If DTC is not pending, go to next step.
  9. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. If any DTC is present, go to appropriate test. If no DTC is present, test is complete.
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