AutoCodes – Generic – C0028

C0028 Code - Rear Left ABS Sensor Signal

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Rear Left ABS Sensor. Common causes include Faulty Rear Left ABS Sensor, Rear Left ABS Sensor harness is open or shorted, Rear Left ABS 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: C0028 indicates Rear Left ABS Sensor Signal.
Common causes: Common causes include Faulty Rear Left ABS Sensor, Rear Left ABS Sensor harness is open or shorted, Rear Left ABS 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 2,632

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 C0028 Description

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

OBDII Code C0028 - Rear Left ABS Sensor Signal - AutoCodes.com — C0028 Code - Rear Left ABS Sensor Signal

What does this mean?

What are the Possible Causes of the DTC C0028?

Faulty Rear Left ABS Sensor
Rear Left ABS Sensor harness is open or shorted
Rear Left ABS Sensor circuit poor electrical connection

How to Fix the DTC C0028?

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 C0028 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 C0028 code?

Need more information on how to fix the C0028 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0028 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0028 Subaru — Rear Left ABS Sensor Signal

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 C0028 Code

1. What are the common symptoms of OBDII code C0028 (Rear Left ABS Sensor Signal)?

- Common symptoms include the ABS warning light coming on, traction control issues, and potential loss of ABS functionality.

2. What are the possible causes of OBDII code C0028 (Rear Left ABS Sensor Signal)?

- Possible causes include a faulty ABS sensor, damaged wiring or connectors, sensor misalignment, or issues with the ABS control module.

3. How can I diagnose the cause of OBDII code C0028 (Rear Left ABS Sensor Signal)?

- Diagnose by visually inspecting the ABS sensor and its wiring, checking for damaged components, using a scan tool to read the code and monitor sensor data, and performing a road test to observe ABS performance.

4. Can I drive my vehicle with OBDII code C0028 (Rear Left ABS Sensor Signal)?

- It is not recommended to drive with this code active, as it may affect the vehicle's ABS system and compromise safety during braking.

5. How do I repair OBDII code C0028 (Rear Left ABS Sensor Signal)?

- Repair methods may include replacing the faulty ABS sensor, repairing damaged wiring or connectors, realigning the sensor, or reprogramming the ABS control module.

6. Is it possible to reset OBDII code C0028 (Rear Left ABS Sensor Signal) with a simple reset tool?

- A basic OBDII code reader may be able to clear the code temporarily, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. Can weather conditions affect the triggering of OBDII code C0028 (Rear Left ABS Sensor Signal)?

- Extreme weather conditions, such as heavy rain or snow, can potentially impact the ABS sensor's performance and trigger the code. Ensure the sensor is well-protected and functioning properly.

8. What is the typical cost to repair OBDII code C0028 (Rear Left ABS Sensor Signal) at a professional auto repair shop?

- Repair costs can vary depending on the specific cause of the issue, but expect to pay for diagnostic time, parts replacement, and labor, which could range from $100 to $500 or more.

9. Are there any DIY methods to troubleshoot OBDII code C0028 (Rear Left ABS Sensor Signal) before seeking professional help?

- DIY methods may include visually inspecting the sensor and wiring, cleaning connectors, checking for loose connections, and using a multimeter to test sensor output.

10. How soon should I address OBDII code C0028 (Rear Left ABS Sensor Signal) to prevent further damage to my vehicle?

- It is recommended to address the code promptly to prevent potential brake system malfunctions and ensure the ABS system functions correctly for safe driving.