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NO.15 EMISSION COMPLIANCE [MZI-3.7] NO.15 EMISSION COMPLIANCE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 15 EMISSION COMPLIANCE DESCRIPTION Fails emissions test. POSSIBLE CAUSE Vacuum lines leakage or blockage Cooling system malfunction Spark plug malfunction Leakage from intake manifold Erratic or no signal from CMP sensor Inadequate fuel pressure PCV valve malfunction or incorrect valve installation Exhaust system clogging Fuel tank ventilation system malfunction Fuel-filler cap malfunction Charcoal canister damage Air cleaner element clogging or restriction Throttle body malfunction Erratic signal to ignition coil Improper air/fuel mixture ratio control operation Bend or open circuit HO2S wiring harness Catalyst converter malfunction Engine internal parts malfunction Excessive carbon is built up in combustion chamber Improper engine compression Improper valve timing WARNING: The following troubleshooting flow chart contains fuel system diagnosis and Fuel vapor is hazardous. It can easily ignite, causing serious injury Fuel line spills and leakage are dangerous. Fuel can ignite and cause (See BEFORE SERVICE PRECAUTION [MZI-3.7] .)
2008 Mazda CX-9 Grand Touring 2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
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