AutoCodes – Scion – P1118 Scion

P1118 Scion Code - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System

Quick Answer

P1118 Scion indicates Coolant Temperature Sensor Circuit High for Coolant Heat Storage System. Common causes include Faulty Engine Coolant Temperature (ECT) sensor for HST, Low engine coolant level, Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted. 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 Scion indicates Coolant Temperature Sensor Circuit High for Coolant Heat Storage System.
Common causes: Common causes include Faulty Engine Coolant Temperature (ECT) sensor for HST, Low engine coolant level, Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted.
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 2,483

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P1118 Scion Description

OBDII Code P1118 Scion - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System - AutoCodes.com — P1118 Scion Code - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System

What does this mean?

What are the Possible Causes of the DTC P1118 Scion?

Faulty Engine Coolant Temperature (ECT) sensor for HST
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 Scion?

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 Scion 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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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.