AutoCodes – Buick – C0027 Buick

C0027 Buick Code - Left Front Wheel Speed Sensor Signal Erratic

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Left Front Wheel Speed Sensor. Common causes include Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted, Left Front Wheel Speed 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: C0027 Buick indicates Left Front Wheel Speed Sensor Signal Erratic.
Common causes: Common causes include Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted, Left Front Wheel Speed 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 1,163

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 May 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0027 Buick Description

The Anti-Lock Brake System (ABS) Module monitors the Left Front Wheel Speed Sensor. The ABS Module sets the OBDII code when the Left Front Wheel Speed Sensor is not to factory specifications.

OBDII Code C0027 Buick - Left Front Wheel Speed Sensor Signal Erratic - AutoCodes.com — C0027 Buick Code - Left Front Wheel Speed Sensor Signal Erratic

What does this mean?

What are the Possible Causes of the DTC C0027 Buick?

Faulty Left Front Wheel Speed Sensor
Left Front Wheel Speed Sensor harness is open or shorted
Left Front Wheel Speed Sensor circuit poor electrical connection

How to Fix the DTC C0027 Buick?

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 C0027 Buick 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 C0027 Buick code?

Need more information on how to fix the C0027 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0027 Buick 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 C0027 Buick Code

1. What are the common symptoms of OBDII code C0027 in a Buick related to the left front wheel speed sensor signal?

- Common symptoms include ABS light illumination, traction control issues, and potential loss of stability control.

2. What are the possible causes of the left front wheel speed sensor signal erratic error code C0027 in a Buick?

- Possible causes may include a faulty wheel speed sensor, damaged wiring or connectors, sensor alignment issues, or a failing ABS control module.

3. How can I diagnose the root cause of OBDII code C0027 in my Buick related to the left front wheel speed sensor?

- Diagnose by visually inspecting the sensor and its connections, checking for damaged wiring, testing the sensor's resistance, and using a scan tool to monitor sensor data.

4. What are some DIY repair tips for addressing the left front wheel speed sensor signal erratic error code C0027 in my Buick?

- DIY repair tips include cleaning sensor connections, ensuring proper sensor alignment, checking and repairing damaged wiring, and potentially replacing the faulty sensor.

5. Is it safe to continue driving my Buick with the C0027 code related to the left front wheel speed sensor signal issue?

- It is not recommended to continue driving the vehicle with this error code, as it can affect the functionality of the ABS and stability control systems, potentially compromising safety.

6. Can weather conditions or road debris cause the left front wheel speed sensor signal erratic error code C0027 in a Buick?

- Yes, extreme weather conditions, road debris, or water intrusion can sometimes lead to sensor malfunctions triggering the C0027 code.

7. How much does it typically cost to repair the left front wheel speed sensor signal erratic error code C0027 in a Buick?

- The repair cost can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code C0027 in my Buick make the issue disappear permanently?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem causing the left front wheel speed sensor signal erratic error.

9. Can a mechanic use a scan tool to reset the OBDII code C0027 related to the left front wheel speed sensor issue in my Buick?

- Yes, a mechanic can use a scan tool to clear the code after diagnosing and repairing the root cause of the problem.

10. How important is it to address the OBDII code C0027 Buick error related to the left front wheel speed sensor signal issue promptly?

- It is crucial to address this error promptly to ensure the proper functioning of the ABS, traction control, and stability control systems in your Buick.