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DTC P0453 [MZI-3.7] DTC P0453 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 6 Perform the fuel tank pressure sensor Is the fuel tank pressure sensor No Replace the evaporative hose component, then go to the next step. (See FUEL TANK REMOVAL/INSTALLATION [MZI-3.7] .) 7 VERIFY TROUBLESHOOTING OF Make sure to reconnect all Turn ignition switch to the ON Clear the DTC from the PCM Start the engine and warm it up Is same DTC present? Yes Replace the PCM, then go to the next step. (See No Go to the next step. 8 VERIFY AFTER REPAIR Perform the "After Repair Are any DTCs present? Yes Go to the applicable DTC inspection. (See DTC No Troubleshooting completed. DTC P0453 Fuel tank pressure sensor high input DETECTION CONDITION The PCM monitors the evaporative emission (EVAP) control system fuel tank POSSIBLE CAUSE Fuel tank pressure sensor malfunction Connector or terminal malfunction Open circuit between fuel tank pressure sensor terminal A and PCM terminal 1AB Open circuit between fuel tank pressure sensor terminal B and PCM terminal 1AL Short to the constant voltage supply circuit between fuel tank pressure sensor Short to power supply between fuel tank pressure sensor terminal C and PCM Fuel tank pressure sensor power circuit and signal circuit are shorted each other
2008 Mazda CX-9 Grand Touring 2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
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