P1118 2007 Toyota Prius Code - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System
Quick Answer
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. Common causes include Coolant Heat Storage Tank, Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage), Low engine coolant level. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1118 2007 Toyota Prius indicates Coolant Temperature Sensor Circuit High for Coolant Heat Storage System.
- Common causes
- Common causes include Coolant Heat Storage Tank, Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage), Low engine coolant level.
- 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.
Code P1118 2007 Toyota Prius Description
What are the Possible Causes of the DTC P1118 2007 Toyota Prius?
- 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
How to Fix the DTC P1118 2007 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 P1118 2007 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.
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Frequently Asked Questions about P1118 2007 Toyota Prius Code
What does the OBDII code P1118 mean for a 2007 Toyota Prius?
The P1118 code indicates a high signal voltage in the coolant temperature sensor circuit for the coolant heat storage system, suggesting a malfunction or issue with the sensor or wiring.
What are the common symptoms associated with the P1118 code?
Common symptoms may include poor fuel economy, overheating, warning lights on the dashboard, and reduced engine performance due to improper coolant temperature readings.
What could cause the P1118 code to trigger in a 2007 Toyota Prius?
Potential causes include a faulty coolant temperature sensor, damaged wiring or connectors in the sensor circuit, or issues within the engine control module (ECM).
How can I diagnose the P1118 code?
To diagnose this code, you can start by visually inspecting the wiring and connectors for damage, testing the coolant temperature sensor with a multimeter, and checking for other related trouble codes that might be present.
What are some common repair solutions for the P1118 code?
Common repairs may involve replacing the coolant temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
Is it safe to drive a 2007 Toyota Prius with the P1118 code?
While it may be safe to drive short distances, it is advisable to address the issue promptly as it can lead to overheating or other engine problems if left unresolved.
Can the P1118 code clear itself?
The P1118 code may clear itself if the underlying issue is resolved and the vehicle is driven through several cycles, but it is best to address the root cause to prevent the code from returning.
How much does it typically cost to repair the P1118 code?
Repair costs can vary widely depending on the specific issue, but replacing a coolant temperature sensor may cost between $100 and $300, including parts and labor.
Will clearing the P1118 code without fixing the issue cause problems?
Yes, clearing the code without addressing the underlying issue can lead to continued engine performance problems and potential engine damage over time. It is recommended to diagnose and fix the problem first.
Discuss the causes and fixes for P1118 2007 Toyota Prius OBDII Code
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