Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 155 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (AJ))ENGINE CONTROL SYSTEM OPERATION INSPECTIONVARIABLE VALVE TIMING CONTROL SYSTEM OPERATION INSPECTIONWHEN IDLING CAN BE CONTINUED - LEFT BANK
2010 Mazda 5 Sport, 2.3 L, Standard
When Idling Can Be Continued - Left Bank
2010 Mazda 5 Sport, 2.3 L, StandardSECTION When Idling Can Be Continued - Left Bank
WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect OCV (LH) connector.
- Warm up the engine to idle.
- Apply the battery voltage to the OCV and verify that the engine idles roughly or stalls.
- If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation).
- If the engine does not idle roughly or stall, go to next step.
- Remove the OCV (LH) and perform spool valve operation inspection. (See
OIL CONTROL VALVE (OCV) INSPECTION
.)
- If not as specified, inspect the following:
- OCV (LH)
- Harnesses and connectors between OCV (LH) and PCM have an open or short circuit.
- If as specified, inspect the following left bank hydraulic passages for clogging or leakage or both.
- Oil pressure switch - OCV
- OCV - camshaft
- Camshaft internal passage
- If not as specified, inspect the following:
- If they are okay, replace the left bank camshaft pulley (with built-in variable valve timing actuator).
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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.