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 MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 59 (ENGINE CONTROLS [SELF-DIAGNOSTICS 2.3L])DIAGNOSTIC TESTSDTC P0223: THROTTLE POSITION SENSOR NO. 2 CIRCUIT - HIGH INPUTDETECTION CONDITION
1999 Mazda 626 ES, 2.5 D, Standard
Detection Condition
1999 Mazda 626 ES, 2.5 D, StandardSECTION Detection Condition
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors input voltage from front HO2S when following monitoring conditions are met. If input voltage from sensor never exceeds 0.55 volt for 83.2 seconds, PCM determines HO2S sensor circuit is not activated.
Monitoring Conditions:
- MODE 3 - HO2S Heater, HO2S & TWC Repair Verification Drive Mode.
- Engine speed is more than 1500 RPM.
- Engine coolant temperature is more than 176°F (80°C).
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.