2007 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE

Monitor Strategy

Case 1: ECT is between 35 and 60°C (95 and 140°F) 

MONITOR STRATEGY (Case 1) - ECT IS BETWEEN 35 AND 60°C (95 AND 140°F)

Related DTCs P0116
Required sensors/components (Main) Engine coolant temperature sensor
Required sensors/components (Related) -
Frequency of operation Once per driving cycle
Duration 1 second
MIL operation 2 driving cycles
Sequence of operation None

Case 2: ECT is higher than 60°C (140°F) 

MONITOR STRATEGY (Case 2) - ECT IS HIGHER THAN 60°C (140°F)

Related DTCs P0116
Required sensors/components (Main) Engine coolant temperature sensor
Required sensors/components (Related) -
Frequency of operation Once per driving cycle
Duration 0.032 seconds
MIL operation 6 driving cycles
Sequence of operation None
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.

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