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P0117 Acura Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The P0117 diagnostic trouble code (DTC) for Acura vehicles indicates an issue with the Engine Coolant Temperature Sensor 1 Circuit, specifically showing low voltage. Common causes include Malfunctioning engine coolant temperature sensor, Damaged or disconnected sensor wiring, Short circuit or open circuit in the sensor circuit. 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
P0117 Acura indicates Engine Coolant Temperature Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Malfunctioning engine coolant temperature sensor, Damaged or disconnected sensor wiring, Short circuit or open circuit in the sensor circuit.
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 07, 2024
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Code P0117 Acura Description

The P0117 diagnostic trouble code (DTC) for Acura vehicles indicates an issue with the Engine Coolant Temperature Sensor 1 Circuit, specifically showing low voltage. The engine coolant temperature sensor plays a crucial role in monitoring the temperature of the engine coolant, providing this information to the engine control module (ECM) to adjust fuel delivery and ignition timing. When the sensor detects low voltage, it means that the coolant temperature is lower than expected, which can lead to poor engine performance, decreased fuel efficiency, and potential overheating issues.

OBDII Code P0117 Acura - Engine Coolant Temperature Sensor 1 Circuit Low Voltage
P0117 Acura Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Common Causes of P0117 Acura

  1. Malfunctioning engine coolant temperature sensor
  2. Damaged or disconnected sensor wiring
  3. Short circuit or open circuit in the sensor circuit
  4. Faulty ECM
  5. Coolant leakage or low coolant level

Symptoms of P0117 Acura

  1. Check Engine Light illuminated
  2. Engine running rough or stalling
  3. Decreased fuel efficiency
  4. Overheating issues
  5. Poor engine performance

How to Fix P0117 Acura

  1. Begin by diagnosing the issue using a scan tool to confirm the P0117 code and check the engine coolant temperature sensor's voltage readings.
  2. Inspect the sensor and its wiring for any visible damage, corrosion, or loose connections. Replace the sensor if necessary.
  3. Test the sensor circuit for continuity and repair any open circuits or shorts as needed.
  4. Clear the DTC and reset the ECM to see if the code returns. Monitor the vehicle's performance to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or cooling system components.

Cost to Fix P0117 Acura

The typical repair costs for addressing a P0117 code on an Acura vehicle can range from $100 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing. To obtain a precise estimate, it's recommended to check with local auto repair shops for accurate pricing information.

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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 P0117 Acura Code

1. What are the common symptoms of OBDII code P0117 in an Acura related to the Engine Coolant Temperature Sensor 1 Circuit Low Voltage?

- Common symptoms include the engine running rough, decreased fuel efficiency, issues with starting the vehicle, and the temperature gauge not functioning properly.

2. What are the possible causes of OBDII code P0117 in an Acura?

- The potential causes of this code include a faulty engine coolant temperature sensor, damaged wiring or connectors in the sensor circuit, low coolant levels, or a problem with the engine's computer.

3. How can I diagnose the Engine Coolant Temperature Sensor 1 Circuit Low Voltage issue in my Acura?

- To diagnose this issue, you can use an OBDII scanner to read the code, visually inspect the sensor and its wiring for any damage, test the sensor's resistance, and check the coolant levels in the vehicle.

4. Can I still drive my Acura with OBDII code P0117 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and poor performance. It is best to address the issue promptly.

5. What is the typical repair process for fixing OBDII code P0117 in an Acura?

- The typical repair process involves replacing the engine coolant temperature sensor, repairing any damaged wiring or connectors, ensuring proper coolant levels, and clearing the code using an OBDII scanner.

6. Are there any DIY tips for resolving OBDII code P0117 in an Acura?

- DIY tips include checking and cleaning the sensor connector, testing the sensor's resistance with a multimeter, ensuring the coolant system is functioning properly, and addressing any visible damage to the sensor or wiring.

7. How critical is it to address OBDII code P0117 promptly in my Acura?

- It is essential to address this code promptly to prevent potential engine damage, poor fuel efficiency, and other performance issues. Ignoring the code can lead to more significant problems over time.

8. Can a faulty Engine Coolant Temperature Sensor affect the overall performance of my Acura?

- Yes, a faulty sensor can impact the engine's performance, fuel efficiency, and emissions control system in your Acura. It is crucial to ensure the sensor is functioning correctly.

9. How much does it typically cost to repair OBDII code P0117 in an Acura?

- The cost of repairing this code can vary depending on the extent of the issue and whether you choose to do the repairs yourself or take your vehicle to a mechanic. It may range from $50 to $200 or more.

10. Is it possible for OBDII code P0117 to return after the repair in my Acura?

- It is possible for the code to return if the root cause of the issue was not properly addressed during the repair. It is essential to follow proper diagnostic procedures and ensure all related components are functioning correctly.

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