AutoCodes – Cadillac – C1227 Cadillac

C1227 Cadillac 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 Cadillac 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 4,510
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 27, 2020
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Code C1227 Cadillac 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 C1227 Cadillac - Left Rear Excessive Wheel Speed Variation - AutoCodes.com
C1227 Cadillac Code - Left Rear Excessive Wheel Speed Variation

What are the Possible Causes of the DTC C1227 Cadillac?

  • 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 Cadillac?

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 Cadillac 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 C1227 Cadillac Code

1. What are common symptoms of OBDII code C1227 in a Cadillac related to left rear excessive wheel speed variation?

The common symptoms include traction control light illuminating on the dashboard, ABS system not functioning properly, and potential stability control issues.

2. What are the possible causes of OBDII code C1227 in a Cadillac indicating left rear excessive wheel speed variation?

The code may be triggered by a faulty wheel speed sensor, damaged wiring or connectors in the left rear wheel speed circuit, or issues with the ABS module.

3. How can I diagnose the cause of OBDII code C1227 in a Cadillac related to left rear excessive wheel speed variation?

Diagnosis typically involves inspecting the left rear wheel speed sensor, checking the wiring and connectors for damage, and using a scan tool to retrieve more detailed information from the ABS module.

4. Can driving with OBDII code C1227 in a Cadillac indicating left rear excessive wheel speed variation cause further damage?

Continuing to drive with this code can potentially lead to safety issues, as the ABS and traction control systems may not function as intended, compromising vehicle stability and braking performance.

5. Is it safe to ignore OBDII code C1227 in a Cadillac related to left rear excessive wheel speed variation?

It is not recommended to ignore this code, as it indicates a problem with the vehicle's safety systems. Prompt diagnosis and repair are essential to ensure proper functioning of the ABS and traction control systems.

6. Are there any DIY repair tips for addressing OBDII code C1227 in a Cadillac related to left rear excessive wheel speed variation?

DIY repair options may include visually inspecting the wheel speed sensor and its connections, checking for damaged wiring, and cleaning any debris or corrosion that may be affecting sensor performance.

7. How much does it typically cost to repair OBDII code C1227 in a Cadillac indicating left rear excessive wheel speed variation?

The cost of repair can vary depending on the exact cause of the issue. It may involve replacing a faulty wheel speed sensor, repairing damaged wiring, or addressing issues with the ABS module, with costs ranging from a few hundred to over a thousand dollars.

8. Can extreme weather conditions contribute to triggering OBDII code C1227 in a Cadillac related to left rear excessive wheel speed variation?

Extreme weather conditions, such as heavy rain, snow, or ice, can potentially affect wheel speed sensor performance and trigger the code due to variations in wheel speed readings caused by slippery road surfaces.

9. How long does it typically take to repair OBDII code C1227 in a Cadillac indicating left rear excessive wheel speed variation?

The repair time can vary depending on the specific cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and address the problem effectively.

10. Is it necessary to reset the OBDII system after repairing OBDII code C1227 in a Cadillac related to left rear excessive wheel speed variation?

After repairing the issue, it is recommended to clear the OBDII system codes using a scan tool to reset the system and ensure that the ABS and traction control systems are functioning correctly.

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