AutoCodes – Generic – C0227

C0227 Code - Erratic Left Front Speed Sensor

Quick Answer

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. Common causes include Faulty Left Front Speed Sensor, Left Front Speed Sensor harness is open or shorted, Left Front 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: C0227 indicates Erratic Left Front Speed Sensor.
Common causes: Common causes include Faulty Left Front Speed Sensor, Left Front Speed Sensor harness is open or shorted, Left Front 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 2,964

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0227 Description

As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

OBDII Code C0227 - Erratic Left Front Speed Sensor - AutoCodes.com — C0227 Code - Erratic Left Front Speed Sensor

What does this mean?

What are the Possible Causes of the DTC C0227?

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

How to Fix the DTC C0227?

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 C0227 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 C0227 code?

Need more information on how to fix the C0227 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0227 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0227 Buick — Erratic Left Front Speed Sensor
C0227 Cadillac — Erratic Left Front Speed Sensor
C0227 Chevrolet — Erratic Left Front Speed Sensor
C0227 GMC — Erratic Left Front Speed Sensor

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 C0227 Code

1. What are the common symptoms of OBDII code C0227 (Erratic Left Front Speed Sensor)?

- The common symptoms include ABS or traction control warning lights illuminated on the dashboard, erratic speedometer readings, and potential loss of ABS or traction control functionality.

2. What are the possible causes of OBDII code C0227?

- The code C0227 is typically triggered by a faulty left front wheel speed sensor, damaged wiring or connectors related to the sensor, or issues with the ABS module.

3. How can I diagnose the cause of OBDII code C0227?

- Diagnosing the code involves checking the left front wheel speed sensor for damage, inspecting its wiring and connectors for any issues, and using a diagnostic scanner to read the ABS module's error codes.

4. Can I still drive my vehicle with OBDII code C0227 present?

- While you may still be able to drive your vehicle with this code, it is not recommended as it can affect the proper functioning of ABS and traction control systems, compromising your safety on the road.

5. What are some repair tips for addressing OBDII code C0227?

- Repair tips include replacing the left front wheel speed sensor if faulty, repairing or replacing damaged wiring or connectors, and resetting the ABS module after the repair is completed.

6. How much does it cost to repair OBDII code C0227?

- The cost of repairing OBDII code C0227 can vary depending on the extent of the issue and the specific parts that need replacement. It is advisable to consult a professional mechanic for an accurate estimate.

7. Can OBDII code C0227 be triggered intermittently?

- Yes, OBDII code C0227 can be triggered intermittently, especially if the issue is related to a loose connection or intermittent fault in the left front speed sensor or its wiring.

8. Are there any DIY solutions for fixing OBDII code C0227?

- While some basic troubleshooting like checking connections and inspecting wiring can be done DIY, it is recommended to consult a professional mechanic for a proper diagnosis and repair of this code.

9. Is it important to address OBDII code C0227 promptly?

- Yes, it is important to address OBDII code C0227 promptly to ensure the proper functioning of the ABS and traction control systems, which are crucial for vehicle stability and safety.

10. Can other ABS-related issues cause OBDII code C0227 to appear?

- Yes, other ABS-related issues such as faulty ABS modules or other wheel speed sensors can sometimes trigger OBDII code C0227, so a comprehensive diagnosis is recommended to identify the root cause.