SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA20066 I, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISSYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM L3)NO. 15 EMISSION COMPLIANCENOTES
2006 Mazda 6 i, 4D Sedan, Automatic

No. 15 Emission Compliance: Notes

2006 Mazda 6 i, 4D Sedan, AutomaticSECTION Notes
POSSIBLE CAUSE DESCRIPTION

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
  • EGR valve malfunction
  • Exhaust system clogging
  • Fuel tank ventilation system malfunction
  • Charcoal canister damage
  • Air cleaner element clogging or restriction
  • Throttle body malfunction
  • Improper air/fuel mixture ratio control operation
  • 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 repair procedures. Read following warnings before servicing fuel system:
    • 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

    Recommended Tools & Savings

    Use the Manual With the Right Hardware

    Pair factory procedures with proven DIY tools so the instructions are easier to execute.

    Affiliate disclosure: We may earn a commission at no extra cost to you.

    Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

    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.