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P0117 Audi Code - Engine Coolant Temperature Circuit Low

Quick Answer

The P0117 code for Audi specifically refers to the Engine Coolant Temperature Circuit Low. Common causes include Faulty Engine Coolant Temperature sensor, Short or open circuit in the ECT sensor wiring, Corrosion or poor connection in the ECT 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 Audi indicates Engine Coolant Temperature Circuit Low.
Common causes
Common causes include Faulty Engine Coolant Temperature sensor, Short or open circuit in the ECT sensor wiring, Corrosion or poor connection in the ECT 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 08, 2024
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Code P0117 Audi Description

The P0117 code for Audi specifically refers to the Engine Coolant Temperature Circuit Low. This means that the Engine Control Module (ECM) has detected a lower than expected voltage signal from the Engine Coolant Temperature (ECT) sensor. The ECT sensor is responsible for measuring the temperature of the engine coolant, which is crucial for the ECM to adjust fuel injection, ignition timing, and other engine functions accordingly.

OBDII Code P0117 Audi - Engine Coolant Temperature Circuit Low
P0117 Audi Code - Engine Coolant Temperature Circuit Low

Common Causes of P0117 Audi

  1. Faulty Engine Coolant Temperature sensor
  2. Short or open circuit in the ECT sensor wiring
  3. Corrosion or poor connection in the ECT sensor circuit
  4. Coolant level is too low
  5. Faulty ECM

Symptoms of P0117 Audi

  1. Check Engine Light is illuminated
  2. Engine running hotter or colder than usual
  3. Poor fuel economy
  4. Engine misfires
  5. Rough idling or stalling

How to Fix P0117 Audi

  1. Begin by diagnosing the issue with a scan tool to confirm the P0117 code.
  2. Inspect the ECT sensor and its wiring for any visible damage, corrosion, or loose connections.
  3. Test the ECT sensor's resistance using a multimeter to determine if it is within the manufacturer's specifications.
  4. If the ECT sensor is faulty, replace it with a new one.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0117 Audi

The typical repair costs for addressing a P0117 code can vary depending on the specific cause of the issue. In general, replacing a faulty Engine Coolant Temperature sensor can cost between $50 and $150 for the part, with additional labor costs ranging from $50 to $150. Overall, the total repair cost can range from $100 to $300. Keep in mind that these are rough estimates, and actual costs may vary based on the factors mentioned earlier. It's recommended to consult with a mechanic or auto repair shop for a more accurate cost estimate.

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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 Audi Code

1. What are the common symptoms of OBDII code P0117 in an Audi?

The common symptoms of code P0117 include a temperature gauge reading consistently low, engine overheating, poor fuel economy, and potential issues with the vehicle's heater or air conditioning system.

2. What are the possible causes of the Engine Coolant Temperature Circuit Low code in an Audi?

Some possible causes of code P0117 in an Audi include a faulty coolant temperature sensor, a damaged or corroded sensor connector, low coolant levels, a malfunctioning thermostat, or wiring issues in the coolant temperature circuit.

3. How can I diagnose the cause of OBDII code P0117 in my Audi?

To diagnose code P0117, you can use a scan tool to read the coolant temperature sensor data, visually inspect the sensor and its wiring for any damage, check coolant levels, test the thermostat, and verify proper electrical connections in the circuit.

4. Can I continue driving my Audi with OBDII code P0117 present?

It is not recommended to continue driving your Audi with code P0117 present, as it can lead to potential engine damage from overheating or incorrect fuel mixture. It is best to address the issue promptly to avoid further problems.

5. How can I repair OBDII code P0117 in my Audi?

Repairing code P0117 may involve replacing the coolant temperature sensor, repairing or replacing damaged wiring or connectors, ensuring proper coolant levels, and checking the thermostat for proper operation. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Will resetting the OBDII code P0117 in my Audi make it go away permanently?

Resetting the code may temporarily clear the Check Engine Light, but if the underlying issue causing code P0117 is not addressed, the code is likely to reappear. It is crucial to diagnose and repair the root cause of the problem to prevent future occurrences.

7. Can a DIY enthusiast fix OBDII code P0117 in an Audi?

Depending on the DIY enthusiast's skill level and access to tools, it may be possible to address code P0117 by replacing the coolant temperature sensor or checking basic wiring connections. However, more complex diagnostics and repairs may require professional assistance.

8. Is it safe to ignore OBDII code P0117 in my Audi?

Ignoring code P0117 can lead to engine overheating, poor performance, and potential damage to engine components. It is not safe to disregard this code, and addressing it promptly is essential to maintain the health and functionality of your Audi.

9. Can extreme weather conditions trigger OBDII code P0117 in an Audi?

Extreme weather conditions, such as very cold temperatures, can affect the accuracy of the coolant temperature sensor and potentially trigger code P0117. Ensuring proper coolant levels and functioning components can help mitigate the impact of weather-related issues.

10. How long does it take to repair OBDII code P0117 in an Audi?

The time required to repair code P0117 in an Audi can vary depending on the exact cause of the issue, availability of parts, and the mechanic's expertise. Simple fixes like sensor replacement may take an hour or two, while more complex diagnoses and repairs could extend the repair time.

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