Engine-Codes - Toyota - P1150 2005 TOYOTA PRIUS

P1150 2005 TOYOTA PRIUS - Coolant Path Clog of Coolant Heat Storage System

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?

P1150 2005 TOYOTA PRIUS Possible Causes

  • Coolant heat storage tank outlet temperature sensor
  • Water valve (coolant flow control valve)
  • Cooling system (clogging)
  • Engine Control Module (ECM)

How do I fix code P1150 2005 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's pins.

Cost of diagnosing the P1150 2005 TOYOTA PRIUS code

Labor: 1.0

The cost of diagnosing the P1150 2005 TOYOTA PRIUS code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P1150 2005 TOYOTA PRIUS Meaning

This system uses an electric pump to supply hot coolant stored in the coolant heat storage (CHS) 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 Engine Control Module (ECM) operates the electric water pump to direct the hot coolant in the CHS 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 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 the 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.

P1150 2005 TOYOTA PRIUS More Information

Need more information on how to fix the P1150 2005 TOYOTA PRIUS code?
Get Access to Factory Service Manuals

Need more help?

Get the P1150 2005 Toyota Prius code diagnosed by a professional: Find a repair shop in your area