C1227 Buick Code - Left Rear 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 Rear Wheel Speed Sensor is part of hub assembly), Faulty Left Rear Wheel Speed Sensor, Left Rear 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
- C1227 Buick indicates Left Rear Excessive Wheel Speed Variation.
- Common causes
- Common causes include Faulty Hub Assembly (Left Rear Wheel Speed Sensor is part of hub assembly), Faulty Left Rear Wheel Speed Sensor, Left Rear 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.
Code C1227 Buick Description
What are the Possible Causes of the DTC C1227 Buick?
- Faulty Hub Assembly (Left Rear Wheel Speed Sensor is part of hub assembly)
- Faulty Left Rear Wheel Speed Sensor
- Left Rear Wheel Speed Sensor harness is open or shorted
- Left Rear Wheel Speed Sensor circuit poor electrical connection
How to Fix the DTC C1227 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 C1227 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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Frequently Asked Questions about C1227 Buick Code
1. What does the OBDII code C1227 mean on a Buick?
C1227 indicates that the vehicle's ABS system has detected excessive speed variation at the left rear wheel, which could affect braking performance.
2. What are the common symptoms of a C1227 code in a Buick?
Symptoms may include an illuminated ABS or traction control warning light, reduced braking efficiency, or inconsistent braking during driving.
3. What causes the C1227 code to appear in a Buick?
The code can be triggered by a faulty wheel speed sensor, damaged wiring or connectors, a malfunctioning ABS module, or issues with the wheel bearing causing erratic readings.
4. Can I still drive my Buick with a C1227 code?
While the vehicle may still be drivable, the ABS and traction control systems could be compromised, increasing the risk of wheel lockup or loss of traction in certain conditions.
5. How do I diagnose the C1227 code in my Buick?
Start by inspecting the left rear wheel speed sensor for damage, checking the wiring and connectors for corrosion or breaks, and using a scan tool to monitor sensor data for irregularities.
6. How can a faulty wheel speed sensor cause the C1227 code?
A faulty sensor may send incorrect or intermittent signals to the ABS module, leading to the detection of excessive wheel speed variation.
7. What tools are needed to fix the C1227 code in a Buick?
You may need a diagnostic scan tool, a multimeter for testing electrical connections, and basic hand tools to replace the wheel speed sensor or repair wiring.
8. How much does it cost to repair a C1227 code in a Buick?
The cost can vary, but replacing a wheel speed sensor typically ranges from $100 to $300, including parts and labor. Wiring repairs may vary depending on the extent of the damage.
9. Can a bad wheel bearing trigger the C1227 code?
Yes, a worn or damaged wheel bearing can cause erratic wheel speed readings, which may trigger the C1227 code.
10. Do I need to reset the ABS system after repairing the C1227 code?
Yes, after completing repairs, use a scan tool to clear the code and reset the ABS system to ensure proper functionality.
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