C1254 2015 GMC Sierra Code - Longitudinal 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
- C1254 2015 GMC Sierra indicates Longitudinal 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.
Code C1254 2015 GMC Sierra Description
What are the Possible Causes of the DTC C1254 2015 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 C1254 2015 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1254 2015 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.
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Frequently Asked Questions about C1254 2015 GMC Sierra Code
1. What does the OBDII code C1254 mean on a 2015 GMC Sierra?
C1254 indicates a performance issue with the Longitudinal Acceleration Sensor, which monitors forward and backward movement to support the vehicle's stability control and braking systems.
2. What are the common symptoms of code C1254 in a 2015 GMC Sierra?
Symptoms can include the ABS or traction control warning light turning on, reduced stability control function, or altered braking performance.
3. What causes the C1254 code to appear?
Common causes include a faulty longitudinal acceleration sensor, wiring issues such as damaged or corroded connections, or a problem with the ABS control module.
4. How do I diagnose the C1254 code on a 2015 GMC Sierra?
Diagnosis involves scanning for additional codes, inspecting the sensor and its wiring for damage, and testing the sensor's output using a diagnostic tool.
5. Can I drive my 2015 GMC Sierra with the C1254 code active?
While the vehicle may still be drivable, safety features like ABS and stability control may be compromised, so it’s best to address the issue promptly.
6. How do I fix the C1254 code on a 2015 GMC Sierra?
Repairs may include replacing the longitudinal acceleration sensor, repairing damaged wiring or connectors, or reprogramming or replacing the ABS control module.
7. Where is the longitudinal acceleration sensor located in a 2015 GMC Sierra?
The longitudinal acceleration sensor is typically located near the center of the vehicle, often under the center console or beneath the driver's seat.
8. What tools are needed to fix the C1254 code?
You’ll need an OBDII scanner, a multimeter for testing wiring and connections, and possibly the vehicle's service manual for specific sensor locations and procedures.
9. How much does it cost to repair the C1254 code?
Repair costs can vary, ranging from $100 to $300 for sensor replacement, plus labor. Wiring or ABS module repairs may cost more depending on the issue.
10. Can a software update fix the C1254 code in a 2015 GMC Sierra?
In some cases, a software update for the ABS control module may resolve the issue, especially if the problem is related to calibration or programming.
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