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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISSYMPTOM TROUBLESHOOTING [L3] - ENGINENO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISENOTES
2010 Mazda 5 Sport, 2.3 L, Standard

No. 12 Lack/Loss Of Power-Acceleration/Cruise: Notes

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Notes
SYMPTOM TROUBLESHOOTING - NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [L3]

12 LACK/LOSS OF POWER - ACCELERATION/CRUISE
DESCRIPTION  Performance is poor under load (such as power down when climbing hills).
POSSIBLE CAUSE 
  • Poor fuel quality
  • Air leakage from intake air system
  • Intake air system restriction
  • Intake air temperature too hot
  • Improper installation of EGR valve
  • Vacuum leakage
  • PCM DTC is stored
  • Engine overheating
  • APP sensor malfunction
  • TP sensor malfunction
  • CKP sensor and related wiring harness malfunction
  • MAF sensor and related wiring harness malfunction
  • IAT sensor or related wiring harness malfunction
  • Battery power supply circuit malfunction
  • VSS and related wiring harness malfunction
  • CKP sensor and teeth of crankshaft pulley malfunction
  • Spark plug malfunction
  • Ignition coil malfunction
  • Improper operation of electronic throttle control system
  • Exhaust system part malfunction
  • Excessive/Inadequate fuel pressure
    • Intermittent open or short in fuel pump related circuit
    • Fuel pump mechanical malfunction
    • Fuel line restriction or clogging
    • Fuel leakage from fuel injector
    • Fuel injector is clogging
  • Improper operation of variable tumble control
  • Improper operation of variable intake air control
  • Improper operation of A/C system
  • Purge solenoid valve malfunction
  • Evaporative emission control system malfunction
  • CMP sensor and teeth of camshaft malfunction
  • Improper EGR valve operation
  • Improper operation of variable valve timing control system
  • Low engine compression
  • Improper valve timing
  • PCV valve malfunction
  • Brake dragging
  • ATX malfunction (ATX)
  • Clutch slippage (MTX)
    WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the 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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this service information.

      (See BEFORE SERVICE PRECAUTION .)

      (See AFTER SERVICE PRECAUTION .)

    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.