Engine-CodesScion – P1118 Scion

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

Quick Answer

The P1118 Scion diagnostic trouble code (DTC) indicates a problem with the Coolant Temperature Sensor Circuit High for the Coolant Heat Storage System. Common causes include Faulty coolant temperature sensor, Wiring or connector issues in the coolant temperature sensor circuit, Coolant level too low or contaminated. 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 coolant temperature sensor, Wiring or connector issues in the coolant temperature sensor circuit, Coolant level too low or contaminated.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1118 Scion Description

The P1118 Scion diagnostic trouble code (DTC) indicates a problem with the Coolant Temperature Sensor Circuit High for the Coolant Heat Storage System. This sensor is responsible for monitoring the temperature of the coolant in the vehicle's engine. When the sensor detects that the coolant temperature is too high, it sends a signal to the engine control module (ECM) to adjust various engine parameters to prevent overheating and potential damage.

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

Common Causes of P1118 Scion

  1. Faulty coolant temperature sensor.
  2. Wiring or connector issues in the coolant temperature sensor circuit.
  3. Coolant level too low or contaminated.
  4. ECM malfunction.
  5. Cooling system malfunction.

Symptoms of P1118 Scion

  1. Check engine light illuminated on the dashboard.
  2. Engine running hotter than normal.
  3. Poor fuel economy.
  4. Engine misfires or rough idling.
  5. Loss of engine power.

How to Fix P1118 Scion

  1. Begin by diagnosing the issue using a scan tool to confirm the P1118 code and pinpoint the exact cause.
  2. Inspect the coolant temperature sensor, wiring, and connectors for any signs of damage or corrosion. Replace any faulty components.
  3. Check the coolant level and quality. Top up the coolant if necessary and flush the system if it is contaminated.
  4. Clear the DTC with a scan tool and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be needed to identify any underlying issues with the cooling system or ECM.

Cost to Fix P1118 Scion

The cost of repairing a P1118 Scion code can vary depending on the specific cause of the issue. In general, replacing a faulty coolant temperature sensor can cost between $50 to $150, while addressing wiring or connector issues may add to the total cost. Labor costs can range from $80 to $150 per hour, and additional charges for diagnosis and testing may apply. It's recommended to consult with a qualified mechanic or service center to get an accurate estimate based on your vehicle's make and model.

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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.

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