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HOMESERVICE MANUALSMAZDA2008TRIBUTE S SPORT, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 344 (SYMPTOM TROUBLESHOOTING (ENGINE CONTROL SYSTEM AJ))NO. 15 EMISSION COMPLIANCENOTES
2008 Mazda Tribute s Sport, 4WD

No. 15 Emission Compliance: Notes

2008 Mazda Tribute s Sport, 4WDSECTION Notes
WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DESCRIPTION & POSSIBLE CAUSE

15 Emission compliance
DESCRIPTION 
  • Emission compliance test failed.
POSSIBLE CAUSE 
  • Vacuum lines leakage or blockage
  • Cooling system malfunction
  • Spark plug malfunction
  • Air leakage from intake manifold
  • Erratic or no signal from CMP sensor
  • Inadequate fuel pressure
  • PCV valve malfunction or incorrect valve installation
  • EGR valve malfunction
  • Exhaust system clogging
  • Fuel tank ventilation system malfunction
  • Charcoal canister damage
  • Air cleaner element clogging or restriction
  • Throttle body malfunction
  • Ignition coil or related circuit malfunction.
  • Improper air/fuel mixture ratio control operation
  • Excessive carbon built up in combustion chamber
  • Improper engine compression
  • Improper valve timing
  • Catalyst converter malfunction
  • Engine internal parts malfunction
    WARNING:
    • The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
      • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
      • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.

        (See BEFORE REPAIR PROCEDURE .)

        (See AFTER REPAIR PROCEDURE .)

    RENDER: 1.0x

    NO RELATED

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    When to See a Mechanic

    Stop DIY work and contact a certified mechanic immediately if any of the following apply:

    • • You smell fuel, burning insulation, or see smoke.
    • • Brakes feel soft, pull hard to one side, or make grinding noises.
    • • The engine overheats, stalls repeatedly, or misfires under load.
    • • You are missing required tools, torque specs, or safe lifting equipment.
    • • You are not confident in the next step or safety outcome.