AutoCodes – Honda – P1115 Honda

P1115 Honda Code - Engine Coolant Temperature Sensor Circuit Intermittent High Voltage

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Low engine coolant level, Engine Coolant Temperature (ECT) sensor harness is open or shorted. 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: P1115 Honda indicates Engine Coolant Temperature Sensor Circuit Intermittent High Voltage.
Common causes: Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Low engine coolant level, Engine Coolant Temperature (ECT) sensor harness is open or shorted.
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 3,316

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 Apr 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1115 Honda 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 P1115 Honda - Engine Coolant Temperature Sensor Circuit Intermittent High Voltage - AutoCodes.com — P1115 Honda Code - Engine Coolant Temperature Sensor Circuit Intermittent High Voltage

What does this mean?

What are the Possible Causes of the DTC P1115 Honda?

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

How to Fix the DTC P1115 Honda?

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 P1115 Honda 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 P1115 Honda code?

Need more information on how to fix the P1115 Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1115 Honda Code

1. What are the common symptoms of OBDII code P1115 in a Honda?

The common symptoms of code P1115 include erratic engine temperature readings, poor fuel economy, rough idling, and potential overheating issues.

2. What can cause the Engine Coolant Temperature Sensor Circuit Intermittent High Voltage in a Honda?

The most common causes of code P1115 in a Honda are a faulty engine coolant temperature sensor, wiring issues, or a problem with the sensor circuit.

3. How can I diagnose the Engine Coolant Temperature Sensor Circuit Intermittent High Voltage in my Honda?

To diagnose P1115, you can use a code reader to check for the specific fault code, visually inspect the sensor and its wiring for any damage, and test the sensor's resistance and voltage output.

4. What should I do if I get the OBDII code P1115 in my Honda?

If you get code P1115, it is recommended to address the issue promptly to prevent potential engine damage. You may need to replace the engine coolant temperature sensor or repair any wiring issues.

5. Can I continue driving my Honda with OBDII code P1115?

It is not recommended to continue driving your Honda with code P1115, as it can lead to inaccurate temperature readings and potential engine overheating. It is best to address the issue as soon as possible.

6. How much does it typically cost to repair OBDII code P1115 in a Honda?

The cost of repairing code P1115 in a Honda can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Are there any DIY repair tips for fixing the Engine Coolant Temperature Sensor Circuit Intermittent High Voltage in a Honda?

If you have some experience with automotive repairs, you may be able to replace the engine coolant temperature sensor yourself. Be sure to consult your vehicle's service manual for guidance.

8. Will resetting the OBDII code P1115 in my Honda make it go away permanently?

Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing P1115 is not addressed, the code is likely to reappear.

9. Can a bad engine coolant temperature sensor cause other problems in my Honda?

Yes, a faulty engine coolant temperature sensor can cause a variety of issues, including poor fuel economy, rough idling, and inaccurate temperature readings on the dashboard.

10. How important is it to fix OBDII code P1115 in a Honda promptly?

It is important to address code P1115 promptly to ensure the engine is operating at the correct temperature and to prevent potential damage or overheating issues.