Engine-CodesGMC – C1251 2017 GMC Sierra

C1251 2017 GMC Sierra Code - Lateral Acceleration Sensor Performance

Quick Answer

The C1251 diagnostic trouble code for a 2017 GMC Sierra specifically relates to the Lateral Acceleration Sensor Performance. Common causes include Faulty lateral acceleration sensor, Damaged wiring or connectors related to the sensor, Corrosion or contamination affecting sensor performance. 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
C1251 2017 GMC Sierra indicates Lateral Acceleration Sensor Performance.
Common causes
Common causes include Faulty lateral acceleration sensor, Damaged wiring or connectors related to the sensor, Corrosion or contamination affecting sensor performance.
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.
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code C1251 2017 GMC Sierra Description

The C1251 diagnostic trouble code for a 2017 GMC Sierra specifically relates to the Lateral Acceleration Sensor Performance. This sensor is a crucial component of the vehicle's stability control system, also known as the Electronic Stability Control (ESC) system. The lateral acceleration sensor is responsible for measuring the vehicle's lateral (side-to-side) acceleration, which is essential for the ESC system to function properly.

OBDII Code C1251 2017 GMC Sierra - Lateral Acceleration Sensor Performance
C1251 2017 GMC Sierra Code - Lateral Acceleration Sensor Performance

Common Causes of C1251 2017 GMC Sierra

  1. Faulty lateral acceleration sensor
  2. Damaged wiring or connectors related to the sensor
  3. Corrosion or contamination affecting sensor performance
  4. Issues with the ESC module processing sensor data
  5. Electrical system malfunctions affecting sensor communication

Symptoms of C1251 2017 GMC Sierra

  1. Illumination of the ESC warning light on the dashboard
  2. Increased body roll or instability during cornering
  3. Traction control system engaging unexpectedly
  4. Loss of stability control during abrupt maneuvers
  5. Unusual noises coming from the ESC system

How to Fix C1251 2017 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the C1251 code and pinpoint the exact cause of the issue.
  2. Inspect the lateral acceleration sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Test the sensor's output using a diagnostic tool to ensure it is providing accurate data to the ESC system.
  4. If the sensor itself is determined to be faulty, replace it with a new OEM (Original Equipment Manufacturer) sensor to ensure proper functionality.
  5. Clear the trouble codes, reset the ESC system, and perform a road test to verify that the issue has been resolved and the ESC system is operating correctly.

Cost to Fix C1251 2017 GMC Sierra

The typical repair costs for addressing a C1251 code related to the lateral acceleration sensor performance in a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts cost for a new lateral acceleration sensor can range from $100 to $300, while the labor cost for diagnosis and repair can be between $150 and $400. Overall, the total repair cost for this issue may fall within the range of $250 to $700. It's important to note that these estimates are approximate and actual costs may vary based on individual circumstances and the specific requirements of the repair process. Be sure to consult with a qualified mechanic or auto repair shop for a more accurate cost assessment tailored to your vehicle's needs.

Tech Notes for C1251 2017 GMC Sierra









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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 C1251 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code C1251 in a 2017 GMC Sierra related to the Lateral Acceleration Sensor Performance?

The common symptoms include the traction control and stability control lights illuminating on the dashboard, erratic steering response, and potential loss of vehicle stability.

2. What could cause the OBDII code C1251 in a 2017 GMC Sierra indicating Lateral Acceleration Sensor Performance issues?

Possible causes of this code include a faulty lateral acceleration sensor, damaged wiring or connectors related to the sensor, or a malfunction in the vehicle's stability control system.

3. How can I diagnose the OBDII code C1251 in my 2017 GMC Sierra related to the Lateral Acceleration Sensor Performance?

Diagnosis typically involves using a diagnostic scan tool to retrieve the trouble codes, inspecting the lateral acceleration sensor and its connections for any visible damage, and conducting a thorough examination of the vehicle's stability control system.

4. What are some repair tips for resolving OBDII code C1251 in a 2017 GMC Sierra due to Lateral Acceleration Sensor Performance issues?

Repair tips may include replacing the faulty lateral acceleration sensor, repairing or replacing damaged wiring or connectors, resetting the trouble codes with a scan tool, and ensuring proper calibration of the sensor.

5. Can I drive my 2017 GMC Sierra with the OBDII code C1251 related to Lateral Acceleration Sensor Performance illuminated?

It is not recommended to drive the vehicle with this code active, as it may affect the stability and control of the vehicle. It is advisable to have the issue diagnosed and repaired before continuing to drive the vehicle.

6. How critical is it to address the OBDII code C1251 in a 2017 GMC Sierra linked to Lateral Acceleration Sensor Performance?

It is important to address this code promptly, as it can impact the vehicle's stability control system and potentially compromise safety while driving. Ignoring the issue may lead to further problems with the vehicle's handling.

7. Is it possible to reset the OBDII code C1251 in a 2017 GMC Sierra without addressing the underlying Lateral Acceleration Sensor Performance problem?

While you can reset the trouble codes temporarily, the underlying issue causing the code will persist. It is recommended to diagnose and repair the root cause to prevent the code from reoccurring.

8. How much does it typically cost to repair OBDII code C1251 in a 2017 GMC Sierra due to Lateral Acceleration Sensor Performance issues?

The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts, labor, and diagnostic services. Contacting a professional mechanic for an estimate is advisable.

9. Are there any preventive measures to avoid encountering OBDII code C1251 related to Lateral Acceleration Sensor Performance in a 2017 GMC Sierra?

Regular maintenance checks, including inspecting the stability control system components, ensuring proper wiring connections, and addressing any warning signs promptly, can help prevent issues leading to this trouble code.

10. Can a DIY enthusiast with basic automotive knowledge attempt to fix OBDII code C1251 in a 2017 GMC Sierra associated with Lateral Acceleration Sensor Performance?

While some aspects of the repair, such as checking connections, can be attempted by a DIY enthusiast, diagnosing and repairing issues related to the lateral acceleration sensor and stability control system may require specialized tools and expertise best handled by a professional mechanic.

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