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DTC P0643 [MZI-3.7] DTC P0643 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 6 Inspect the fuel tank pressure Is there any malfunction? Yes Replace the evaporative hose component, then go No Go to the next step. 7 VERIFY TROUBLESHOOTING OF Verify that all disconnected Clear the DTC from the PCM Perform the "KOEO or KOER self- Is the PENDING CODE for the 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 P0643 Sensor reference voltage circuit high DETECTION CONDITION Indicates the reference voltage circuit is higher than reference voltage POSSIBLE CAUSE Short to power supply between fuel tank pressure sensor terminal C and PCM Fuel tank pressure sensor malfunction Connector or terminal malfunction
2008 Mazda CX-9 Grand Touring 2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
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