P155D 2018 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 2018 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 2018 GMC Sierra Description
What are the Possible Causes of the DTC P155D 2018 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 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P155D 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 P155D 2018 GMC Sierra code?
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Frequently Asked Questions about P155D 2018 GMC Sierra Code
1. What does OBDII code P155D on a 2018 GMC Sierra mean?
The code P155D specifically relates to the Hill Descent Control Message Counter Incorrect in a 2018 GMC Sierra.
2. What are the common symptoms associated with OBDII code P155D in a 2018 GMC Sierra?
Common symptoms include the illumination of the Check Engine Light, a message related to Hill Descent Control appearing on the dashboard, and potential issues with the vehicle's traction control system.
3. What can cause the OBDII code P155D to trigger in a 2018 GMC Sierra?
The code P155D is typically triggered when there is a discrepancy or error detected in the message counter related to the Hill Descent Control system.
4. How serious is the OBDII code P155D in a 2018 GMC Sierra?
While the code itself may not directly impact the drivability of the vehicle, it is important to address the underlying issue to ensure proper functionality of the Hill Descent Control system and other related systems.
5. How can I diagnose the OBDII code P155D in my 2018 GMC Sierra?
Diagnosis of the code P155D may require the use of a diagnostic scanner to retrieve the specific fault codes and perform further troubleshooting to pinpoint the exact cause.
6. Can I still drive my 2018 GMC Sierra with the OBDII code P155D present?
It is generally safe to drive the vehicle with the code P155D, but it is recommended to have the issue addressed as soon as possible to prevent any potential complications with the Hill Descent Control system.
7. What are some possible repair tips for resolving the OBDII code P155D in a 2018 GMC Sierra?
Repair tips may include checking and resetting the message counter, inspecting the wiring and connections related to the Hill Descent Control system, and ensuring proper functionality of the system components.
8. Is it necessary to visit a professional mechanic to fix the OBDII code P155D in a 2018 GMC Sierra?
While some DIY enthusiasts may attempt to troubleshoot and repair the issue themselves, consulting a professional mechanic with experience in GMC vehicles is recommended for an accurate diagnosis and proper resolution.
9. Are there any recalls or technical service bulletins related to the OBDII code P155D in a 2018 GMC Sierra?
It is advisable to check with the manufacturer or authorized GMC service centers for any recalls or technical service bulletins related to the code P155D to see if there are known solutions or remedies available.
10. How can I prevent the OBDII code P155D from reoccurring in my 2018 GMC Sierra?
Regular maintenance, such as ensuring proper system checks and addressing any related issues promptly, can help prevent the code P155D from reoccurring in the future.
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