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 MANUALSTOYOTA2012PRIUS THREEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 44 (ENGINE CONTROL SYSTEM (PLUG-IN) (DIAGNOSTIC CODES (P0010-P0454)))SFI SYSTEMDTC P0116: ENGINE COOLANT TEMPERATURE CIRCUIT RANGE / PERFORMANCE PROBLEMTYPICAL ENABLING CONDITIONS
2012 Toyota Prius Three
Typical Enabling Conditions
2012 Toyota Prius ThreeSECTION Typical Enabling Conditions
WARNING: This page is about a different variant/trim than selected.
ALL
| Monitor runs whenever the following DTCs are not stored | None |
COLD START MONITOR
| All of the following conditions are met | - |
| Auxiliary battery voltage | 10.5 V or higher |
| Time after engine start | 1 second or more |
| Engine coolant temperature at engine start | Less than 60°C (140°F) |
| Soak time | 0 second or more |
| Accumulated mass air flow | 2219 g or more |
| Fuel cut | Off |
| Intake air temperature sensor circuit fail (P0112, P0113) | Not detected |
| Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) | Not detected |
| Engine water pump circuit fail (P261B, P261C, P261D) | Not detected |
| Thermostat fail (P0128) | Not detected |
| Difference between engine coolant temperature at engine start and intake air temperature | Less than 40°C (72°F) |
SOAK MONITOR
| All of the following conditions are met | - |
| Auxiliary battery voltage | 10.5 V or higher |
| Engine | Running |
| Soak time | 5 hours or more |
| Either of the following condition is met | 1 or 2 |
| 1. Engine coolant temperature | 60°C (140°F) or higher |
| 2. Accumulated mass air flow | 3438 g or more |
| Intake air temperature sensor circuit fail (P0112, P0113) | Not detected |
| Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) | Not detected |
| Engine water pump circuit fail (P261B, P261C, P261D) | Not detected |
| Thermostat fail (P0128) | Not detected |
| Soak timer circuit fail (P2610) | Not detected |
RENDER: 1.0x
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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.