AutoCodesGMC – C1250 2018 GMC Sierra

C1250 2018 GMC Sierra Code - Lateral Acceleration Sensor Circuit High Voltage

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
C1250 2018 GMC Sierra indicates Lateral Acceleration Sensor Circuit High Voltage.
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 184
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 C1250 2018 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 C1250 2018 GMC Sierra - Lateral Acceleration Sensor Circuit High Voltage - AutoCodes.com
C1250 2018 GMC Sierra Code - Lateral Acceleration Sensor Circuit High Voltage

What are the Possible Causes of the DTC C1250 2018 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 C1250 2018 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1250 2018 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 C1250 2018 GMC Sierra code?

Need more information on how to fix the C1250 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 C1250 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code C1250 on a 2018 GMC Sierra related to the Lateral Acceleration Sensor Circuit High Voltage?

- Common symptoms include the ABS warning light being illuminated on the dashboard, stability control issues, and potential traction control system malfunctions.

2. What are the possible causes of OBDII code C1250 on a 2018 GMC Sierra?

- The code C1250 indicating a Lateral Acceleration Sensor Circuit High Voltage issue can be caused by a faulty lateral acceleration sensor, damaged wiring or connectors, or a problem within the sensor circuit itself.

3. How can I diagnose the OBDII code C1250 on my 2018 GMC Sierra?

- Diagnosis involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the lateral acceleration sensor and its wiring for any visible damage, and testing the sensor's output voltage.

4. Can I continue driving my 2018 GMC Sierra with OBDII code C1250?

- It is not recommended to drive the vehicle with the ABS warning light on, as it indicates potential safety issues related to the stability and traction control systems. Prompt attention and repair are advised.

5. What are some repair tips for fixing OBDII code C1250 on a 2018 GMC Sierra?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the lateral acceleration sensor if faulty, and clearing the trouble code using a diagnostic scanner after the repair.

6. Is it possible to reset the OBDII code C1250 on a 2018 GMC Sierra without fixing the underlying issue?

- While you can clear the trouble code temporarily, it will likely reappear if the root cause of the Lateral Acceleration Sensor Circuit High Voltage problem is not addressed.

7. How much does it typically cost to repair OBDII code C1250 on a 2018 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the issue. It may range from replacing a damaged wire or connector to installing a new lateral acceleration sensor, with costs including parts and labor.

8. Can extreme weather conditions impact the occurrence of OBDII code C1250 on a 2018 GMC Sierra?

- Extreme weather conditions such as excessive heat or moisture can potentially impact the lateral acceleration sensor's performance and lead to the triggering of code C1250.

9. Are there any preventative maintenance measures to avoid OBDII code C1250 on a 2018 GMC Sierra?

- Regular vehicle inspections, including checking the integrity of wiring and connectors, can help prevent issues with the lateral acceleration sensor and reduce the likelihood of encountering code C1250.

10. How long does it typically take to repair OBDII code C1250 on a 2018 GMC Sierra?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. It may take anywhere from an hour for simple fixes to several hours for more involved repairs.

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