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 MANUALSTOYOTA2009YARIS S, 4D HATCHBACKREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (1NZ-FE)SFI SYSTEMDTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT MALFUNCTION; DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT; DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUTTYPICAL MALFUNCTION THRESHOLDS
2009 Toyota Yaris S, 4D Hatchback
Typical Malfunction Thresholds
2009 Toyota Yaris S, 4D HatchbackSECTION Typical Malfunction Thresholds
P0115:
TYPICAL MALFUNCTION THRESHOLDS
| ECT sensor voltage | Less than 0.14 V, or more than 4.91 V |
P0117:
TYPICAL MALFUNCTION THRESHOLDS
| ECT sensor voltage [ECT] | Less than 0.14 V [More than 140°C (284°F)] |
P0118:
TYPICAL MALFUNCTION THRESHOLDS
| ECT sensor voltage [ECT] | More than 4.91 V [Less than -40°C (-40°F)] |
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.