C1254 GMC 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 GMC 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 GMC Description
What are the Possible Causes of the DTC C1254 GMC?
- 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 GMC?
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 GMC 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 C1254 GMC code?
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Need Help with the Code?
Get the C1254 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- C1254 2014 GMC Sierra — Longitudinal Acceleration Sensor Performance
- C1254 2015 GMC Sierra — Longitudinal Acceleration Sensor Performance
- C1254 2016 GMC Sierra — Longitudinal Acceleration Sensor Performance
- C1254 2017 GMC Sierra — Longitudinal Acceleration Sensor Performance
- C1254 2018 GMC Sierra — Longitudinal Acceleration Sensor Performance
Frequently Asked Questions about C1254 GMC Code
1. What are the common symptoms of OBDII code C1254 GMC (Longitudinal Acceleration Sensor Performance)?
The common symptoms include the ABS warning light being illuminated on the dashboard, potential loss of traction control functionality, and erratic braking behavior.
2. What are the possible causes of OBDII code C1254 GMC?
Possible causes include a faulty longitudinal acceleration sensor, damaged wiring or connectors leading to the sensor, or issues with the sensor's calibration.
3. How can I diagnose the cause of OBDII code C1254 GMC?
Diagnosis typically involves using a diagnostic scanner to retrieve the specific trouble code, conducting a visual inspection of the sensor and related components, and performing tests to check the sensor's functionality.
4. Can I continue driving my vehicle with OBDII code C1254 GMC present?
It is not recommended to continue driving the vehicle with this code present, as it may affect the performance of the ABS and traction control systems, potentially compromising vehicle safety.
5. How can I repair OBDII code C1254 GMC?
Repair options include replacing the faulty longitudinal acceleration sensor, repairing or replacing damaged wiring or connectors, and recalibrating the sensor as per manufacturer specifications.
6. Is it possible to reset OBDII code C1254 GMC without fixing the underlying issue?
While clearing the trouble code may temporarily turn off the warning light, it is crucial to address the root cause to prevent further issues with the ABS and traction control systems.
7. How much does it typically cost to repair OBDII code C1254 GMC?
The cost of repair can vary depending on the extent of the issue, the price of parts needed, and labor costs. It is advisable to consult with a mechanic or dealership for an accurate estimate.
8. Can extreme weather conditions affect the triggering of OBDII code C1254 GMC?
Extreme weather conditions, such as extreme heat or cold, can potentially impact sensor performance and trigger the code. Ensuring proper maintenance and protection of sensor components is essential.
9. Are there any preventative measures to avoid OBDII code C1254 GMC from occurring?
Regular maintenance checks, including inspecting sensor components for damage or wear, can help prevent issues leading to this trouble code. Driving cautiously and avoiding harsh road conditions can also contribute to sensor longevity.
10. Is it necessary to visit a mechanic for OBDII code C1254 GMC diagnosis and repair?
While some DIY enthusiasts may attempt diagnosis and repairs, seeking professional help from a qualified mechanic or dealership is recommended to accurately diagnose the issue and ensure proper repair procedures are followed.
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