AutoCodes – Mazda – P1117 Mazda

P1117 Mazda Code - Engine Coolant Temperature Sensor Intermittent

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, 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: P1117 Mazda indicates Engine Coolant Temperature Sensor Intermittent.
Common causes: Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, 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 4,136

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 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1117 Mazda 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 P1117 Mazda - Engine Coolant Temperature Sensor Intermittent - AutoCodes.com — P1117 Mazda Code - Engine Coolant Temperature Sensor Intermittent

What does this mean?

What are the Possible Causes of the DTC P1117 Mazda?

Low engine coolant level
Faulty Engine Coolant Temperature (ECT) sensor
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 P1117 Mazda?

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 P1117 Mazda 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 P1117 Mazda 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 P1117 Mazda Code

1. What does the OBDII code P1117 mean on a Mazda?

P1117 indicates an intermittent issue with the Engine Coolant Temperature (ECT) sensor, which monitors the engine's coolant temperature and sends data to the ECU.

2. What are the common symptoms of a P1117 code in a Mazda?

Symptoms may include engine overheating, poor fuel economy, rough idling, difficulty starting, or the Check Engine Light turning on.

3. What causes the P1117 code to appear in a Mazda?

Common causes include a faulty ECT sensor, damaged wiring or connectors, corrosion in the sensor circuit, or an issue with the vehicle's ECU.

4. Can I still drive my Mazda with a P1117 code?

While the car may still be drivable, ignoring this code can lead to poor engine performance or overheating, which could cause severe engine damage over time.

5. How do I diagnose the P1117 code on my Mazda?

Start by inspecting the ECT sensor and its wiring for damage or corrosion. Use a multimeter to check the sensor's resistance and verify the sensorâ€™s signal with an OBDII scanner.

6. How do I fix the P1117 code on a Mazda?

Repairs may include replacing the ECT sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the ECU if needed.

7. How much does it cost to fix the P1117 code on a Mazda?

Replacing the ECT sensor typically costs $50â€“$150 for parts and labor, while wiring or ECU repairs may cost more depending on the extent of the damage.

8. Can a bad thermostat trigger the P1117 code in a Mazda?

While a faulty thermostat is not the direct cause, it can affect engine temperature readings and should be inspected if overheating or cooling issues persist.

9. Will clearing the P1117 code with a scanner fix the problem?

Clearing the code might turn off the Check Engine Light temporarily, but the underlying issue must be diagnosed and fixed to prevent the code from returning.

10. How often do ECT sensors fail in Mazdas?

ECT sensors are generally durable but can fail due to age, wear, or exposure to extreme temperatures after several years of use. Regular maintenance can help prevent issues.