AutoCodes – Buick – C1225 Buick

C1225 Buick Code - Left Front Excessive Wheel Speed Variation

Quick Answer

As the wheel spins, the wheel speed sensor produces an AC signal. Common causes include Faulty Hub Assembly (Left Front Wheel Speed Sensor is part of hub assembly), Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted. 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
C1225 Buick indicates Left Front Excessive Wheel Speed Variation.
Common causes
Common causes include Faulty Hub Assembly (Left Front Wheel Speed Sensor is part of hub assembly), Faulty Left Front Wheel Speed Sensor, Left Front Wheel Speed Sensor harness is open or shorted.
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 6,230
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 26, 2020
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Code C1225 Buick Description

As the wheel spins, the wheel speed sensor produces an AC signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed. The EBCM will set the OBDII code when the sensor is not to factory specifications.
OBDII Code C1225 Buick - Left Front Excessive Wheel Speed Variation - AutoCodes.com
C1225 Buick Code - Left Front Excessive Wheel Speed Variation

What are the Possible Causes of the DTC C1225 Buick?

  • Faulty Hub Assembly (Left Front Wheel Speed Sensor is part of hub assembly)
  • 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 C1225 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 C1225 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.

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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 C1225 Buick Code

What does the OBDII code C1225 mean on a Buick?

1. C1225 indicates "Left Front Excessive Wheel Speed Variation," meaning the ABS module has detected an abnormal speed reading from the left front wheel sensor. 2.

What are the common symptoms of the C1225 code on a Buick?

Symptoms may include the ABS warning light turning on, reduced ABS functionality, erratic braking behavior, or issues with traction control. 3.

What causes the C1225 code to appear on a Buick?

Common causes include a faulty left front wheel speed sensor, damaged wiring or connectors, a dirty or misaligned sensor, or issues with the wheel bearing or reluctor ring. 4.

Can I still drive my Buick with the C1225 code?

While the vehicle may still be drivable, the ABS and traction control systems may not function correctly, increasing the risk of skidding or loss of control in slippery conditions. 5.

How do I diagnose the C1225 code on my Buick?

Start by inspecting the left front wheel speed sensor, its wiring, and connectors for damage or debris. Use a scan tool to monitor wheel speed sensor data for inconsistencies. 6.

How can I fix the C1225 code on my Buick?

Repairs may involve cleaning or replacing the left front wheel speed sensor, fixing damaged wiring, or repairing/replacing the wheel bearing or reluctor ring if they are at fault. 7.

How much does it cost to repair the C1225 code on a Buick?

Repair costs vary but typically range from $100 to $300, depending on whether the issue is with the sensor, wiring, or other components. 8.

Can a dirty wheel speed sensor cause the C1225 code?

Yes, dirt or debris on the sensor or reluctor ring can interfere with proper readings, triggering the C1225 code. 9.

Will resetting the code fix the C1225 issue permanently?

No, clearing the code will only turn off the warning temporarily. The underlying issue must be diagnosed and repaired to prevent the code from returning. 10.

How can I prevent the C1225 code from recurring on my Buick?

Regularly inspect and clean the wheel speed sensors, ensure wiring is intact, and address any unusual noises or vibrations that could indicate a wheel bearing or reluctor ring problem.

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