AutoCodes – Toyota – P1151 2006 Toyota Prius

P1151 2006 Toyota Prius Code - Coolant Heat Storage Tank

Quick Answer

What it means: P1151 2006 Toyota Prius indicates Coolant Heat Storage Tank.
Common causes: Common causes include Coolant heat storage tank.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 5,756

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1151 2006 Toyota Prius Description

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.

OBDII Code P1151 2006 Toyota Prius - Coolant Heat Storage Tank - AutoCodes.com — P1151 2006 Toyota Prius Code - Coolant Heat Storage Tank

What does this mean?

What are the Possible Causes of the DTC P1151 2006 Toyota Prius?

Coolant heat storage tank

How to Fix the DTC P1151 2006 Toyota Prius?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1151 2006 Toyota Prius code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1151 2006 Toyota Prius code?

Need more information on how to fix the P1151 2006 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1151 2006 Toyota Prius code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1151 2006 Toyota Prius Code

1. What are the common symptoms of OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- The common symptoms include poor fuel economy, rough idle, and the check engine light being illuminated.

2. What causes the OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- The code is often triggered by a malfunction in the coolant heat storage tank's control valve or sensor.

3. How can I diagnose the issue causing the OBDII code P1151 in my 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- A diagnostic scan tool can help identify the specific issue with the coolant heat storage tank's components, such as the control valve or sensor.

4. What are some repair tips for fixing OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- Inspect the coolant heat storage tank's components for any signs of damage or malfunction and replace as necessary. It's also recommended to clear the code after repairs are made.

5. Can driving with the OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank cause further damage?

- Continuing to drive with this code may result in decreased fuel efficiency and potential damage to other engine components, so it's best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- The cost of repairs can vary depending on the specific issue and labor rates, but it's recommended to budget for parts and labor costs associated with replacing the faulty components.

7. Are there any recalls or service bulletins related to OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- It's advisable to check with a Toyota dealership or online resources to see if there are any recalls or service bulletins addressing this specific issue in the 2006 Prius model.

8. How long does it typically take to repair OBDII code P1151 in a 2006 Toyota Prius related to the Coolant Heat Storage Tank?

- The repair time can vary depending on the extent of the issue and the availability of parts, but it's generally recommended to allow a few hours for diagnosis and repair.

9. Can I reset the OBDII code P1151 in my 2006 Toyota Prius related to the Coolant Heat Storage Tank myself?

- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, it's important to address the underlying issue causing the code before resetting it.

10. How often does the OBDII code P1151 related to the Coolant Heat Storage Tank reoccur in a 2006 Toyota Prius after it has been repaired?

- If the issue is properly diagnosed and repaired, the code should not reoccur. Regular maintenance and monitoring of the coolant heat storage tank components can help prevent future occurrences.