P155D 2016 GMC Sierra Code - Hill Descent Control Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. 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
- P155D 2016 GMC Sierra indicates Hill Descent Control Message Counter Incorrect.
- 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 P155D 2016 GMC Sierra Description
What are the Possible Causes of the DTC P155D 2016 GMC Sierra?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC P155D 2016 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 P155D 2016 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 P155D 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P155D in a 2016 GMC Sierra related to the Hill Descent Control Message Counter Incorrect?
- The common symptoms include the Hill Descent Control (HDC) warning light illuminating on the dashboard and a possible loss of functionality in the HDC system.
2. What are the possible causes of OBDII code P155D in a 2016 GMC Sierra?
- The code P155D typically indicates that the message counter for the Hill Descent Control system is reporting incorrect data. This can be caused by a faulty control module, wiring issues, or software glitches.
3. How can I diagnose the OBDII code P155D in my 2016 GMC Sierra?
- To diagnose the issue, a professional diagnostic scanner capable of reading GMC-specific codes is recommended. This will help pinpoint the exact cause of the incorrect message counter related to the Hill Descent Control system.
4. Can I still drive my 2016 GMC Sierra with the OBDII code P155D present?
- While the vehicle may still be driveable with the code present, it is advisable to have the issue diagnosed and repaired to ensure the proper functioning of the Hill Descent Control system.
5. How can I repair the Hill Descent Control Message Counter Incorrect issue in my 2016 GMC Sierra?
- Repairing the P155D code may involve checking and repairing any wiring issues, replacing the control module if necessary, or updating the system software to correct the message counter discrepancy.
6. Is it safe to continue using the Hill Descent Control system if the OBDII code P155D is triggered?
- It is not recommended to use the Hill Descent Control system if the P155D code is present, as the incorrect message counter could affect the system's performance and potentially compromise safety.
7. Will resetting the OBDII code P155D in my 2016 GMC Sierra make the issue go away permanently?
- Simply resetting the code may clear the warning light temporarily, but if the underlying issue causing the incorrect message counter is not addressed, the code is likely to reappear.
8. Can a DIY enthusiast fix the OBDII code P155D related to the Hill Descent Control system in a 2016 GMC Sierra?
- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the specific cause of the P155D code may require professional expertise and specialized equipment.
9. How much does it typically cost to repair the OBDII code P155D in a 2016 GMC Sierra at a dealership or repair shop?
- The cost of repairing the OBDII code P155D can vary depending on the exact cause of the issue. It is recommended to obtain a diagnostic assessment from a dealership or repair shop to get an accurate estimate.
10. Can weather or terrain conditions impact the appearance of the OBDII code P155D in a 2016 GMC Sierra?
- Extreme weather or challenging terrain conditions may exacerbate existing issues related to the Hill Descent Control system, potentially triggering the OBDII code P155D. Regular maintenance and inspections can help prevent such occurrences.
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