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Engine-Codes – Scion – P0118 2005 Scion xB

P0118 2005 Scion xB Code - Engine Coolant Temperature Circuit High Input

Quick Answer

The P0118 code for a 2005 Scion xB indicates that there is a problem with the Engine Coolant Temperature (ECT) Circuit High Input. Common causes include Faulty ECT sensor, Wiring issues or loose connections in the ECT 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
P0118 2005 Scion xB indicates Engine Coolant Temperature Circuit High Input.
Common causes
Common causes include Faulty ECT sensor, Wiring issues or loose connections in the ECT 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0118 2005 Scion xB Description

The P0118 code for a 2005 Scion xB indicates that there is a problem with the Engine Coolant Temperature (ECT) Circuit High Input. This means that the Engine Control Module (ECM) has detected that the ECT sensor is sending a signal indicating that the engine coolant temperature is too high, which is outside of the expected range. The ECT sensor is crucial for the ECM to properly adjust fuel injection, ignition timing, and other engine functions based on the engine's temperature.

OBDII Code P0118 2005 Scion xB - Engine Coolant Temperature Circuit High Input
P0118 2005 Scion xB Code - Engine Coolant Temperature Circuit High Input

Common Causes of P0118 2005 Scion xB

  1. Faulty ECT sensor
  2. Wiring issues or loose connections in the ECT circuit
  3. Coolant level too low or contaminated
  4. Faulty thermostat
  5. ECM malfunction

Symptoms of P0118 2005 Scion xB

  1. Check Engine Light illuminated on the dashboard
  2. Engine running rich or poor fuel economy
  3. Engine overheating
  4. Rough idling or stalling
  5. Difficulty starting the engine

How to Fix P0118 2005 Scion xB

  1. Begin by diagnosing the ECT sensor using a scan tool to verify the high input signal.
  2. Inspect the wiring and connections in the ECT circuit for any damage or corrosion, repairing or replacing as necessary.
  3. Check the coolant level and quality, topping up or flushing and refilling the coolant if needed.
  4. Test the thermostat to ensure it is functioning correctly, replacing it if found faulty.
  5. Clear the diagnostic trouble codes and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0118 2005 Scion xB

The cost estimate for repairing a P0118 code on a 2005 Scion xB can vary depending on the specific cause of the issue. On average, the cost of parts for this repair can range from $50 to $200, with labor costs typically adding another $80 to $150 per hour. The total cost can range from $150 to $500 or more, depending on the extent of the repair needed. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair required for your vehicle.

What does this mean?

Tech Notes for P0118 2005 Scion xB

Replacing the Coolant Temperature (ECT) sensor usually fixes the problem.

When is the Code Detected?

An excessively high voltage from the sensor is sent to ECM.

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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.

Frequently Asked Questions about P0118 2005 Scion xB Code

1. What does the OBDII code P0118 on a 2005 Scion xB mean?

The OBDII code P0118 indicates a high input signal from the engine coolant temperature sensor circuit in a 2005 Scion xB.

2. What are the common symptoms of a P0118 code in a 2005 Scion xB?

Common symptoms of a P0118 code in a 2005 Scion xB include engine overheating, poor fuel economy, rough idling, and a decrease in overall engine performance.

3. What are the possible causes of a P0118 code in a 2005 Scion xB?

Possible causes of a P0118 code in a 2005 Scion xB include a faulty engine coolant temperature sensor, a problem with the sensor wiring or connector, low coolant levels, or issues with the cooling system.

4. How can I diagnose a P0118 code in a 2005 Scion xB?

To diagnose a P0118 code in a 2005 Scion xB, you can use an OBDII scanner to read the code, check the engine coolant level, inspect the sensor wiring and connector, and test the engine coolant temperature sensor for proper operation.

5. What are the repair options for a P0118 code in a 2005 Scion xB?

Repair options for a P0118 code in a 2005 Scion xB may include replacing the engine coolant temperature sensor, repairing any damaged wiring or connectors, topping up the coolant level, and ensuring the cooling system is functioning correctly.

6. Can a P0118 code in a 2005 Scion xB cause engine damage?

A P0118 code in a 2005 Scion xB can potentially cause engine damage if left unresolved for an extended period, as it may lead to overheating and other related issues. It's important to address the code promptly to prevent any serious damage.

7. Is it safe to drive with a P0118 code in a 2005 Scion xB?

It is not recommended to drive a 2005 Scion xB with a P0118 code, as it can lead to engine overheating and potential damage. It's best to address the issue before driving the vehicle to prevent any further complications.

8. How much does it typically cost to repair a P0118 code in a 2005 Scion xB?

The cost of repairing a P0118 code in a 2005 Scion xB can vary depending on the exact cause of the issue and the labor rates in your area. Generally, it may cost anywhere from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix a P0118 code in a 2005 Scion xB?

A DIY enthusiast with the necessary tools and knowledge may be able to fix a P0118 code in a 2005 Scion xB, especially if the issue is related to the engine coolant temperature sensor or wiring. However, if in doubt, it's best to consult a professional mechanic.

10. How often does a P0118 code occur in a 2005 Scion xB?

The occurrence of a P0118 code in a 2005 Scion xB can vary depending on the vehicle's maintenance history and driving conditions. It is not a common code, but it can still occur due to sensor or cooling system issues.

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