AutoCodes – GMC – C1251 2014 GMC Sierra

C1251 2014 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 2014 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 174

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C1251 2014 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 2014 GMC Sierra - Lateral Acceleration Sensor Performance - AutoCodes.com — C1251 2014 GMC Sierra Code - Lateral Acceleration Sensor Performance

What does this mean?

What are the Possible Causes of the DTC C1251 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the C1251 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1251 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2014 GMC Sierra Code

1. What does the OBDII code C1251 mean on a 2014 GMC Sierra?

C1251 indicates a problem with the Lateral Acceleration Sensor Performance, which monitors side-to-side movement to assist with stability control.

2. What are the symptoms of code C1251 on a 2014 GMC Sierra?

Common symptoms include the ABS or traction control warning light illuminating, reduced stability control performance, and erratic handling during sharp turns.

3. What causes the C1251 code on a 2014 GMC Sierra?

Causes can include a faulty lateral acceleration sensor, damaged wiring or connectors, or issues with the ABS module.

4. Can I drive my 2014 GMC Sierra with a C1251 code?

While the vehicle may still be drivable, stability control features may be compromised, making it unsafe in certain conditions like wet or icy roads.

5. How do you diagnose the C1251 code on a 2014 GMC Sierra?

A technician will use a diagnostic scanner to read the code, inspect the lateral acceleration sensor and related wiring, and perform tests to confirm the fault.

6. Where is the lateral acceleration sensor located on a 2014 GMC Sierra?

The sensor is typically located near the center of the vehicle, under the seat or in the center console area, depending on the configuration.

7. How much does it cost to fix code C1251 on a 2014 GMC Sierra?

Repair costs vary but may range from $150 to $500, depending on whether the sensor, wiring, or ABS module needs replacement.

8. Can a dead battery cause the C1251 code to appear?

A weak or dead battery can sometimes cause sensor malfunctions, but this code typically points to a specific issue with the lateral acceleration sensor.

9. Is it necessary to recalibrate the lateral acceleration sensor after replacement?

Yes, the sensor must be recalibrated using a diagnostic tool to ensure proper functionality with the vehicle's stability control system.

10. What should I check before replacing the lateral acceleration sensor for C1251?

Inspect the wiring and connectors for damage, ensure proper voltage to the sensor, and verify the integrity of the ABS module before replacing the sensor.