AutoCodes – Isuzu – P1115 Isuzu

P1115 Isuzu Code - ECT Sensor Circuit Intermittent Voltage High

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 Isuzu indicates ECT Sensor Circuit Intermittent Voltage High.
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 4,617

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 Isuzu 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 Isuzu - ECT Sensor Circuit Intermittent Voltage High - AutoCodes.com — P1115 Isuzu Code - ECT Sensor Circuit Intermittent Voltage High

What does this mean?

What are the Possible Causes of the DTC P1115 Isuzu?

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 Isuzu?

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 Isuzu 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 Isuzu code?

Need more information on how to fix the P1115 Isuzu 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 Isuzu Code

1. What are the common symptoms of OBDII code P1115 (Isuzu) ECT Sensor Circuit Intermittent Voltage High?

The common symptoms include engine overheating, poor fuel efficiency, rough idling, and potential stalling.

2. What are the possible causes of the ECT Sensor Circuit Intermittent Voltage High code?

Possible causes include a faulty engine coolant temperature (ECT) sensor, loose or corroded wiring connections, a malfunctioning ECT sensor circuit, or a problem with the engine control module (ECM).

3. How can I diagnose the ECT Sensor Circuit Intermittent Voltage High code in my Isuzu vehicle?

You can diagnose the issue by performing a visual inspection of the ECT sensor and its wiring, testing the ECT sensor for proper resistance values, and checking for any loose connections or damaged wires.

4. Can I drive my Isuzu with the P1115 code present?

It is not recommended to drive your Isuzu with the P1115 code active, as it can lead to potential engine damage or poor performance. It is best to address the issue promptly.

5. What are some repair tips for fixing the ECT Sensor Circuit Intermittent Voltage High code?

Repair tips include replacing the faulty ECT sensor, repairing any damaged wiring, ensuring all connections are secure, and resetting the fault code after the repair.

6. How much does it typically cost to repair the ECT Sensor Circuit Intermittent Voltage High code in an Isuzu vehicle?

The cost of repair can vary depending on the exact cause of the issue and the labor rates in your area. It may range from $100 to $300 or more, including parts and labor.

7. Can a DIY enthusiast fix the P1115 code on their Isuzu?

If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to address the P1115 code yourself. However, if you are unsure, it is best to consult a professional mechanic.

8. Will resetting the fault code make the P1115 code go away permanently?

Resetting the fault code may temporarily clear the code, but if the underlying issue causing the P1115 code is not fixed, it is likely to return. It's important to diagnose and repair the root cause of the problem.

9. How urgent is it to address the ECT Sensor Circuit Intermittent Voltage High code?

It is recommended to address the P1115 code as soon as possible to avoid potential engine damage or performance issues. Ignoring the code can lead to further problems down the line.

10. Is the ECT sensor the same as the coolant temperature sensor in an Isuzu vehicle?

Yes, in most cases, the ECT (engine coolant temperature) sensor is the same as the coolant temperature sensor in an Isuzu vehicle. It measures the temperature of the engine coolant to help regulate engine performance.