AutoCodes – Pontiac – P0115 Pontiac

P0115 Pontiac 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 Pontiac 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 1,140

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

What does this mean?

What are the Possible Causes of the DTC P0115 Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac code?

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

1. What are the common symptoms of OBDII code P0115 in a Pontiac related to the Engine Coolant Temperature Sensor Circuit?

- Common symptoms include inaccurate temperature gauge readings, poor fuel economy, engine overheating, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P0115 in a Pontiac?

- The code P0115 in a Pontiac is often caused by a faulty engine coolant temperature sensor, a problem with the sensor circuit wiring, or issues with the engine control module.

3. How can I diagnose the root cause of OBDII code P0115 in my Pontiac?

- You can diagnose the issue by checking the engine coolant temperature sensor for proper operation, inspecting the sensor circuit wiring for any damage, and using a scan tool to read live data from the sensor.

4. Can I drive my Pontiac with OBDII code P0115 present?

- It is not recommended to drive your Pontiac with OBDII code P0115 present, as it can lead to engine overheating, poor performance, and potential damage to engine components.

5. How can I repair OBDII code P0115 in my Pontiac?

- To repair OBDII code P0115 in your Pontiac, you may need to replace the engine coolant temperature sensor, repair any damaged wiring in the sensor circuit, or reset the engine control module.

6. Are there any DIY tips for troubleshooting OBDII code P0115 in a Pontiac?

- DIY tips include checking the sensor connector for corrosion, testing the sensor resistance with a multimeter, and ensuring the sensor is properly grounded.

7. What are the consequences of ignoring OBDII code P0115 in a Pontiac?

- Ignoring OBDII code P0115 can lead to inaccurate temperature readings, engine overheating, decreased fuel efficiency, and potential damage to the engine over time.

8. How long does it typically take to repair OBDII code P0115 in a Pontiac?

- The repair time for OBDII code P0115 in a Pontiac can vary depending on the exact cause of the issue, but it can typically be resolved within a few hours to a day.

9. Can a faulty engine coolant temperature sensor cause other problems in a Pontiac besides triggering OBDII code P0115?

- Yes, a faulty engine coolant temperature sensor can cause other issues such as rough idling, poor acceleration, and incorrect fuel mixture, impacting overall engine performance.

10. Is it necessary to reset the OBDII system after repairing OBDII code P0115 in a Pontiac?

- It is recommended to reset the OBDII system after repairing OBDII code P0115 in a Pontiac to clear the fault code and ensure proper monitoring of the engine's performance.