AutoCodes – Hummer – P0115 Hummer

P0115 Hummer Code - Engine Coolant Temperature Sensor Circuit

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Faulty Engine Coolant Temperature Sensor, Engine Coolant Temperature Sensor harness is open or shorted, Engine Coolant Temperature Sensor circuit poor electrical connection. 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: P0115 Hummer indicates Engine Coolant Temperature Sensor Circuit.
Common causes: Common causes include Faulty Engine Coolant Temperature Sensor, Engine Coolant Temperature Sensor harness is open or shorted, Engine Coolant Temperature Sensor circuit poor electrical connection.
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 649

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0115 Hummer 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. The Diagnostic Trouble Code (DTC) will set when the Engine Coolant Temperature sensor signal is not to factory specifications.

OBDII Code P0115 Hummer - Engine Coolant Temperature Sensor Circuit - AutoCodes.com — P0115 Hummer Code - Engine Coolant Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P0115 Hummer?

Faulty Engine Coolant Temperature Sensor
Engine Coolant Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0115 Hummer?

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 P0115 Hummer 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 P0115 Hummer code?

Need more information on how to fix the P0115 Hummer 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 P0115 Hummer Code

1. What are the common symptoms of OBDII code P0115 in a Hummer?

- Common symptoms include issues with engine performance, rough idling, poor fuel economy, and potential overheating.

2. What causes the OBDII code P0115 in a Hummer?

- The most common cause of this code is a faulty engine coolant temperature sensor or problems with the sensor circuit.

3. How can I diagnose the issue related to OBDII code P0115 in my Hummer?

- You can use a diagnostic scanner to read the code and monitor the engine coolant temperature sensor's readings to determine if it is functioning correctly.

4. Can a faulty thermostat cause the OBDII code P0115 in a Hummer?

- Yes, a faulty thermostat can sometimes cause incorrect temperature readings that trigger the P0115 code.

5. Is it safe to drive my Hummer with the OBDII code P0115 active?

- It is not recommended to drive your vehicle with this code active as it can lead to performance issues and potential engine damage due to incorrect temperature readings.

6. How can I repair the OBDII code P0115 in my Hummer?

- The typical repair involves replacing the engine coolant temperature sensor or repairing any faults in the sensor circuit.

7. Are there any DIY tips for troubleshooting the OBDII code P0115 in a Hummer?

- You can visually inspect the sensor and its wiring for any signs of damage or corrosion before considering a replacement.

8. Can a low coolant level trigger the OBDII code P0115 in a Hummer?

- Yes, a low coolant level can affect the sensor's readings and potentially trigger the P0115 code.

9. Will resetting the OBDII code P0115 in my Hummer make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue with the sensor or circuit is not addressed, the code is likely to reappear.

10. How much does it typically cost to repair the OBDII code P0115 in a Hummer?

- The cost of repair can vary depending on the specific issue, but replacing the engine coolant temperature sensor usually ranges from $100 to $200 in parts and labor.