AutoCodesChevrolet – C1251 2018 Chevrolet Silverado

C1251 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 171
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 19, 2023
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Code C1251 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Lateral Acceleration Sensor Performance - AutoCodes.com
C1251 2018 Chevrolet Silverado Code - Lateral Acceleration Sensor Performance

What are the Possible Causes of the DTC C1251 2018 Chevrolet Silverado?

  • 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 2018 Chevrolet Silverado?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1251 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the C1251 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1251 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code

1. What are common symptoms of OBDII code C1251 in a 2018 Chevrolet Silverado related to the Lateral Acceleration Sensor Performance issue?

Symptoms may include the traction control system warning light being illuminated, stability control system malfunctions, and potential loss of vehicle stability during turns.

2. What can cause the OBDII code C1251 to trigger in a 2018 Chevrolet Silverado?

The code C1251 is typically triggered when there is a malfunction in the lateral acceleration sensor or its circuitry, which could be caused by sensor failure, wiring issues, or sensor calibration problems.

3. How can I diagnose the Lateral Acceleration Sensor Performance issue in my 2018 Chevrolet Silverado?

Diagnosis involves using a professional OBDII scanner to retrieve the specific code, inspecting the lateral acceleration sensor and its wiring for any visible damage, and conducting a sensor calibration check if necessary.

4. Can I drive my 2018 Chevrolet Silverado with the OBDII code C1251 related to the Lateral Acceleration Sensor Performance issue?

It is not recommended to drive your vehicle with this issue as it can affect the stability and safety systems of your vehicle. Prompt diagnosis and repair are advised.

5. How can I repair the Lateral Acceleration Sensor Performance issue in my 2018 Chevrolet Silverado?

Repair options include replacing the faulty lateral acceleration sensor, repairing any damaged wiring, or recalibrating the sensor as per manufacturer's specifications.

6. Will resetting the trouble codes make the OBDII code C1251 go away in my 2018 Chevrolet Silverado?

Simply resetting the trouble codes may temporarily clear the warning lights, but if the underlying issue causing the code is not addressed, the code is likely to reappear.

7. Is the Lateral Acceleration Sensor Performance issue covered under warranty for a 2018 Chevrolet Silverado?

Depending on your vehicle's warranty status and coverage, the repair for the lateral acceleration sensor performance issue may be covered under warranty. Contact your Chevrolet dealership for more information.

8. Can weather conditions affect the triggering of OBDII code C1251 in a 2018 Chevrolet Silverado?

Extreme weather conditions, such as severe cold or heat, can potentially affect sensor performance and trigger the code. Ensuring proper sensor function in all weather conditions is essential.

9. Are there any safety concerns associated with the Lateral Acceleration Sensor Performance issue in a 2018 Chevrolet Silverado?

Yes, the lateral acceleration sensor is critical for the proper functioning of stability control systems, and a malfunction can compromise vehicle stability during maneuvers, potentially leading to safety hazards.

10. How often should the lateral acceleration sensor be inspected in a 2018 Chevrolet Silverado to prevent OBDII code C1251 issues?

Regular inspections during routine maintenance checks or whenever you experience symptoms related to stability control system malfunctions are recommended to catch any potential issues with the sensor early on.

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