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DIAGNOSTIC PROCEDURE DTC P0172, P0175 (MZI-3.7) DIAGNOSTIC PROCEDURE POSSIBLE CAUSE Fuel rail pressure sensor bias Purge solenoid valve is leaking when the canister is full Engine oil contamination Damaged or contaminated MAF sensor STEP INSPECTION ACTION 1 VERIFY FREEZE FRAME DATA HAS BEEN Has FREEZE FRAME DATA been Yes Go to the next step. No Record FREEZE FRAME DATA on the repair order, then go to the next step. 2 VERIFY RELATED REPAIR INFORMATION Verify related Service Bulletins and/or on- Is any related Service Bulletins available? Yes Perform repair or diagnosis according to If the vehicle is not repaired, go to No Go to the next step. 3 VERIFY RELATED PENDING CODE OR Turn the ignition switch off then to the ON Verify related PENDING CODE or stored Are any DTCs present other than the P0172, P0175, P2196 or P2198? Yes Go to the appropriate DTC No Go to the next step. 4 INSPECT ENTIRE INTAKE AIR SYSTEM Check the intake air system for obstructions, Yes Repair if necessary.
2008 Mazda CX-9 Grand Touring 2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
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