AutoCodes – GMC – C1251 2017 GMC Sierra

C1251 2017 GMC Sierra Code - Lateral Acceleration Sensor Performance

Quick Answer

The Yaw Rate, Lateral Acceleration, and Longitudinal Acceleration Sensors are combined into one Multi-Axis Acceleration Sensor, internal to the Inflatable Restraint Sensing and Diagnostic Module. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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: C1251 2017 GMC Sierra indicates Lateral Acceleration Sensor Performance.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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 195

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 Jul 19, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code C1251 2017 GMC Sierra Description

The Yaw Rate, Lateral Acceleration, and Longitudinal Acceleration Sensors are combined into one Multi-Axis Acceleration Sensor, internal to the Inflatable Restraint Sensing and Diagnostic Module. The Multi-Axis Acceleration Sensor communicates with the Electronic Brake Control Module (EBCM) and Transmission Control Module (TCM) via serial data. The Electronic Brake Control Module activates the stability control function depending on the Multi-Axis Acceleration Sensor input. The Inflatable Restraint Sensing and Diagnostic Module uses the Multi-Axis Acceleration Sensor to determine if the vehicle is in a rollover or near collision incident. The Transmission Control Module sets this Diagnostic Trouble Code (DTC)s. The DTC will be set when the Transmission Control Module detects a fault that prevents it from performing a hill hold function.

OBDII Code C1251 2017 GMC Sierra - Lateral Acceleration Sensor Performance - AutoCodes.com — C1251 2017 GMC Sierra Code - Lateral Acceleration Sensor Performance

What does this mean?

What are the Possible Causes of the DTC C1251 2017 GMC Sierra?

Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C1251 2017 GMC Sierra?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1251 2017 GMC Sierra 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 C1251 2017 GMC Sierra code?

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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.