Engine-Codes - Toyota - P1118 2008 Toyota Prius

P1118 2008 Toyota Prius Code - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System

- Code Popularity: 5,847 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC P1118 2008 Toyota Prius?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Coolant Heat Storage Tank
  • Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage)
  • Low engine coolant level
  • Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted
  • Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection
  • Faulty engine coolant thermostat
⚠ Does your Toyota have Safety Recalls? → Check here

How to Fix the DTC P1118 2008 Toyota Prius?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Search for P1118 2008 Toyota Prius Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1118 2008 Toyota Prius code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P1118 2008 Toyota Prius Code Mean?

This system uses an electric pump to supply hot coolant stored in the coolant heat storage tank into the cylinder head of the engine, in order to optimize engine starting combustion and reduce the amount of unburned gas that is discharged while the engine is started. Before the engine starts, the ECM operates the electric water pump to direct the hot coolant in the heat storage tank into the engine, in order to heat the cylinder head (this process is called "preheat mode"). The duration of the operation of the electric water pump is variable, depending on the temperature of the cylinder head. During the normal operation of the engine, the water valve opens the passage between the cylinder head and the heater and closes the passage between the cylinder head and the tank. During preheat mode in which the cylinder head is heated, the water valve opens the passage between the tank and the cylinder head, in order to allow the coolant to flow from the tank to the cylinder head. At this time, in order to warm up the intake port quickly before the engine is started, the coolant flows in the reverse direction

P1118 2008 Toyota Prius Code - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System

Need more Information on the Code?

Need more information on how to fix the P1118 2008 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1118 2008 Toyota Prius code diagnosed by a professional: Find a repair shop in your area