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P0117 2003 Nissan Altima Sedan Code - Engine Coolant Temperature Circuit Low

Quick Answer

The P0117 code for a 2003 Nissan Altima Sedan indicates a problem with the Engine Coolant Temperature (ECT) Circuit being too low. Common causes include Faulty ECT sensor, Corroded or damaged ECT sensor wiring, Low 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
P0117 2003 Nissan Altima Sedan indicates Engine Coolant Temperature Circuit Low.
Common causes
Common causes include Faulty ECT sensor, Corroded or damaged ECT sensor wiring, Low 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0117 2003 Nissan Altima Sedan Description

The P0117 code for a 2003 Nissan Altima Sedan indicates a problem with the Engine Coolant Temperature (ECT) Circuit being too low. The ECT sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing to ensure optimal engine performance and efficiency. When the ECT circuit is reading lower than expected, it can lead to a variety of issues that affect the vehicle's performance and overall operation.

OBDII Code P0117 2003 Nissan Altima Sedan - Engine Coolant Temperature Circuit Low
P0117 2003 Nissan Altima Sedan Code - Engine Coolant Temperature Circuit Low

Common Causes of P0117 2003 Nissan Altima Sedan

  1. Faulty ECT sensor
  2. Corroded or damaged ECT sensor wiring
  3. Low coolant level
  4. Faulty thermostat
  5. Issues with the ECM

Symptoms of P0117 2003 Nissan Altima Sedan

  1. Check Engine Light illuminated on the dashboard
  2. Engine running rough or misfiring
  3. Poor fuel economy
  4. Difficulty starting the engine
  5. Overheating of the engine

How to Fix P0117 2003 Nissan Altima Sedan

  1. Begin by diagnosing the ECT sensor and its wiring for any faults or damage.
  2. Check the coolant level and quality, ensuring it is at the proper level and free of contaminants.
  3. Test the thermostat to ensure it is functioning correctly and regulating the engine temperature.
  4. If necessary, replace the ECT sensor, repair any damaged wiring, or replace the thermostat.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0117 2003 Nissan Altima Sedan

The cost of repairing a P0117 code on a 2003 Nissan Altima Sedan can vary depending on the specific cause of the issue. On average, the cost of replacing an ECT sensor ranges from $50 to $150, while replacing a thermostat can cost between $100 and $200. Labor costs at auto repair shops typically range from $80 to $150 per hour. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle.

When is the Code Detected?

An excessively low 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 P0117 2003 Nissan Altima Sedan Code

1. What does OBDII code P0117 on a 2003 Nissan Altima Sedan mean?

The code P0117 indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit registering a low voltage.

2. What are the common symptoms of OBDII code P0117 on a 2003 Nissan Altima Sedan?

Common symptoms include poor fuel economy, rough idling, overheating, and potential issues with the vehicle's heater performance.

3. What are the possible causes of OBDII code P0117 on a 2003 Nissan Altima Sedan?

Potential causes include a faulty ECT sensor, damaged wiring or connectors in the ECT circuit, low coolant levels, or a malfunctioning engine control module (ECM).

4. How can I diagnose the issue causing OBDII code P0117 on my 2003 Nissan Altima Sedan?

Diagnose the problem by checking the ECT sensor's resistance, inspecting the wiring and connectors for damage, verifying coolant levels, and using a scan tool to monitor ECT sensor data.

5. Can I drive my 2003 Nissan Altima Sedan with OBDII code P0117?

It is not recommended to drive the vehicle with the P0117 code present, as it can lead to engine performance issues and potential overheating problems.

6. How can I repair OBDII code P0117 on my 2003 Nissan Altima Sedan?

Repair options include replacing the faulty ECT sensor, repairing damaged wiring or connectors, topping up coolant levels, or reprogramming the ECM if necessary.

7. Will resetting the OBDII code P0117 on my 2003 Nissan Altima Sedan make the issue go away?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the P0117 code to reappear.

8. Is it possible to prevent OBDII code P0117 from appearing on my 2003 Nissan Altima Sedan?

Regular maintenance, including checking coolant levels, inspecting the ECT sensor, and addressing any wiring issues promptly, can help prevent the recurrence of the P0117 code.

9. Can a DIY enthusiast repair OBDII code P0117 on a 2003 Nissan Altima Sedan?

Depending on the skill level and tools available, some DIY enthusiasts may be able to diagnose and repair the P0117 code, especially if it involves sensor replacement or basic wiring repairs.

10. How long does it typically take to repair OBDII code P0117 on a 2003 Nissan Altima Sedan?

The repair time for P0117 can vary depending on the root cause of the issue. Simple fixes like sensor replacement may take less than an hour, while more complex wiring repairs or ECM reprogramming could take longer.

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