AutoCodes – Mazda – P0117 Mazda

P0117 Mazda Code - Engine Coolant Temperature Circuit Low Input

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 Mazda indicates Engine Coolant Temperature Circuit Low Input.
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 37,643

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 May 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0117 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.

Sensor Example:

OBDII Code P0117 Mazda - Engine Coolant Temperature Circuit Low Input - AutoCodes.com — P0117 Mazda Code - Engine Coolant Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0117 Mazda?

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 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 P0117 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 P0117 Mazda code?

Need more information on how to fix the P0117 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0117 Mazda code diagnosed by a professional: Find a repair shop in your area

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 Mazda Code

1. What are the common symptoms of OBDII code P0117 in a Mazda?

The common symptoms of OBDII code P0117 in a Mazda include engine overheating, rough idling, poor fuel economy, and the check engine light illuminating.

2. What can cause the OBDII code P0117 to trigger in a Mazda?

The OBDII code P0117 in a Mazda is typically triggered by a faulty engine coolant temperature sensor, a damaged wiring harness, or a problem with the engine control module.

3. How serious is the OBDII code P0117 in a Mazda?

The OBDII code P0117 in a Mazda should be addressed promptly to prevent potential engine damage due to incorrect temperature readings and inefficient engine performance.

4. How can I diagnose the OBDII code P0117 in my Mazda?

To diagnose the OBDII code P0117 in your Mazda, you can use an OBDII scanner to retrieve the trouble code, test the engine coolant temperature sensor, and inspect the wiring connections for any damage.

5. Can I drive my Mazda with the OBDII code P0117?

It is not recommended to drive your Mazda with the OBDII code P0117, as it may lead to engine overheating, reduced fuel efficiency, and potential long-term damage to the engine components.

6. How can I repair the OBDII code P0117 in my Mazda?

To repair the OBDII code P0117 in your Mazda, you may need to replace the engine coolant temperature sensor, repair or replace any damaged wiring, and reset the engine control module to clear the trouble code.

7. Are there any DIY tips for fixing the OBDII code P0117 in a Mazda?

If you have experience working on cars, you may be able to replace the engine coolant temperature sensor yourself to address the OBDII code P0117 in your Mazda. However, it's recommended to consult a professional if you're unsure.

8. How much does it cost to fix the OBDII code P0117 in a Mazda?

The cost to fix the OBDII code P0117 in a Mazda can vary depending on the root cause of the issue, the cost of parts, and labor rates. It's advisable to get a quote from a trusted mechanic.

9. Can a bad thermostat cause the OBDII code P0117 in a Mazda?

While a malfunctioning thermostat can affect engine coolant temperature, it is less likely to directly trigger the OBDII code P0117. It's best to focus on checking the engine coolant temperature sensor and related components first.

10. How often should the engine coolant temperature sensor be replaced in a Mazda to prevent the OBDII code P0117?

The engine coolant temperature sensor in a Mazda should be replaced as part of regular maintenance or when symptoms of failure appear to prevent triggering the OBDII code P0117. Refer to the manufacturer's recommendations for specific intervals.