AutoCodes – Honda – P0117 2009 Honda Accord

P0117 2009 Honda Accord Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat. 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 Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat.
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.

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Code Popularity 6,219

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0117 2009 Honda Accord Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

OBDII Code P0117 2009 Honda Accord - Engine Coolant Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com — P0117 2009 Honda Accord Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0117 2009 Honda Accord?

Low engine coolant level
Faulty Engine Coolant Temperature (ECT) sensor
Faulty engine coolant thermostat
Engine Coolant Temperature (ECT) sensor harness is open or shorted
Engine Coolant Temperature (ECT) sensor circuit poor electrical connection

How to Fix the DTC P0117 2009 Honda Accord?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0117 2009 Honda Accord code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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

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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 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.