P0117 2009 Honda Accord Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage
Quick Answer
The P0117 diagnostic trouble code (DTC) for a 2009 Honda Accord indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a low voltage. Common causes include Faulty ECT Sensor: The most common cause of this code is a malfunctioning ECT sensor that is not providing accurate temperature readings, Wiring Issues: Corroded, damaged, or loose wiring connections between the ECT sensor and the ECM can lead to low voltage readings, ECM Malfunction: A problem with the engine control module (ECM) could prevent it from receiving the correct signals from the ECT sensor. 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 2009 Honda Accord indicates Engine Coolant Temperature Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty ECT Sensor: The most common cause of this code is a malfunctioning ECT sensor that is not providing accurate temperature readings, Wiring Issues: Corroded, damaged, or loose wiring connections between the ECT sensor and the ECM can lead to low voltage readings, ECM Malfunction: A problem with the engine control module (ECM) could prevent it from receiving the correct signals from the ECT sensor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0117 2009 Honda Accord Description
The P0117 diagnostic trouble code (DTC) for a 2009 Honda Accord indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a low voltage. The ECT sensor is a crucial component that monitors the temperature of the engine coolant. This information is essential for the engine control module (ECM) to adjust fuel delivery and ignition timing, ensuring optimal performance and efficiency.
Common Causes of P0117 2009 Honda Accord
- Faulty ECT Sensor: The most common cause of this code is a malfunctioning ECT sensor that is not providing accurate temperature readings.
- Wiring Issues: Corroded, damaged, or loose wiring connections between the ECT sensor and the ECM can lead to low voltage readings.
- ECM Malfunction: A problem with the engine control module (ECM) could prevent it from receiving the correct signals from the ECT sensor.
- Coolant Leak: A coolant leak near the ECT sensor can affect its performance and lead to low voltage readings.
- Electrical Issues: Issues with the vehicle's electrical system, such as a blown fuse or a short circuit, can also trigger this code.
Symptoms of P0117 2009 Honda Accord
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
- Poor Fuel Economy: A malfunctioning ECT sensor can lead to incorrect fuel delivery, resulting in decreased fuel efficiency.
- Engine Overheating: Inaccurate temperature readings may cause the engine to overheat due to improper cooling system operation.
- Hard Starting: The engine may have difficulty starting or may require multiple attempts to start.
- Rough Idling: The engine may idle roughly or inconsistently due to incorrect temperature readings.
How to Fix P0117 2009 Honda Accord
- Diagnostic Testing: Begin by using a scan tool to retrieve the DTC and perform diagnostic testing to confirm the issue is with the ECT sensor circuit.
- ECT Sensor Replacement: Replace the faulty ECT sensor with a new, OEM-quality sensor to ensure accurate temperature readings.
- Check Wiring: Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace any faulty wiring.
- ECM Inspection: If necessary, inspect the ECM for any signs of damage or malfunction. Replace if needed.
- Clear DTC: After completing the repairs, clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0117 2009 Honda Accord
The cost of repairing a P0117 code on a 2009 Honda Accord can vary depending on the specific cause of the issue. Typically, the cost of a new ECT sensor ranges from $20 to $100, depending on the brand and quality. Labor costs for this repair can range from $80 to $150 per hour, with the total repair time likely taking around 1-2 hours. Therefore, the total cost of repairing this issue could range from $100 to $300, including parts and labor. It is advisable to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on your location and vehicle specifics.
When is the Code Detected?
Need more information about the P0117 2009 Honda Accord code?
Need more information on how to fix the P0117 2009 Honda Accord code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0117 2009 Honda Accord code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0117 2009 Honda Accord Code
1. What are the common symptoms of OBDII code P0117 on a 2009 Honda Accord?
- Common symptoms include issues with the engine temperature gauge reading incorrectly, poor fuel economy, and potential stalling or rough idling.
2. What does the Engine Coolant Temperature Sensor 1 Circuit Low Voltage code (P0117) indicate in a 2009 Honda Accord?
- The code P0117 indicates that the Engine Coolant Temperature Sensor 1 is sending a signal to the engine control module (ECM) indicating lower voltage than normal.
3. What are the possible causes of OBDII code P0117 on a 2009 Honda Accord?
- The possible causes of code P0117 include a faulty engine coolant temperature sensor, a damaged sensor connector, wiring issues, low coolant levels, or a malfunctioning ECM.
4. How can I diagnose the Engine Coolant Temperature Sensor 1 Circuit Low Voltage issue on my 2009 Honda Accord?
- You can diagnose the issue by checking the coolant level, inspecting the sensor and its wiring for damage, testing the sensor's resistance with a multimeter, and scanning for additional trouble codes.
5. Is it safe to drive my 2009 Honda Accord with an active P0117 trouble code?
- It is not recommended to drive with an active P0117 code as it can lead to engine overheating, poor performance, and potential damage to engine components.
6. Can I replace the Engine Coolant Temperature Sensor on my 2009 Honda Accord myself?
- Yes, replacing the Engine Coolant Temperature Sensor is a relatively simple task that can often be done by following a few DIY tutorials or using a repair manual specific to your vehicle.
7. How much does it typically cost to repair an OBDII code P0117 on a 2009 Honda Accord?
- The cost of repairing a P0117 code can vary depending on the root cause, but it may range from $50 to $200 for parts and labor, with the sensor itself typically costing around $20 to $50.
8. Are there any preventive maintenance tips to avoid OBDII code P0117 on my 2009 Honda Accord?
- Regularly checking coolant levels, performing cooling system flushes as recommended, and inspecting sensor connections during routine maintenance can help prevent issues with the Engine Coolant Temperature Sensor.
9. Will resetting the trouble codes make the P0117 code disappear permanently on a 2009 Honda Accord?
- Resetting the trouble codes may temporarily clear the P0117 code, but if the underlying issue is not addressed, the code is likely to reappear once the ECM detects the problem again.
Discuss the causes and fixes for P0117 2009 Honda Accord OBDII Code
Code P0117 2009 Honda Accord comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.