P155D 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC P155D 2017 Chevrolet Silverado?
- 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 2017 Chevrolet Silverado?
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 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado Code
1. What does the OBDII code P155D mean on a 2017 Chevrolet Silverado?
P155D indicates an issue with the Hill Descent Control (HDC) system, specifically that the HDC message counter is incorrect or not functioning as expected.
2. What are the common symptoms of code P155D on a 2017 Chevrolet Silverado?
Common symptoms include the Hill Descent Control system not engaging, a malfunction indicator lamp (MIL) on the dashboard, and possible reduced functionality of other stability control features.
3. What causes the P155D code in a 2017 Chevrolet Silverado?
Potential causes include a software glitch in the HDC module, faulty communication between control modules, or a malfunctioning sensor related to the HDC system.
4. Can driving with the P155D code damage my 2017 Chevrolet Silverado?
Driving with this code may not directly damage the vehicle, but it can compromise the Hill Descent Control system, which is critical for safe driving in steep downhill conditions.
5. How can I fix the P155D code on my Chevrolet Silverado?
Start by updating the vehicle’s software through a dealership or certified repair shop. If the problem persists, inspect the HDC system wiring and sensors for damage or faults.
6. Will clearing the P155D code solve the issue?
Clearing the code might temporarily remove the warning, but the underlying issue must be addressed to prevent the code from returning.
7. Is the P155D code specific to the Hill Descent Control system?
Yes, this code is directly related to the Hill Descent Control system and its message counter functionality.
8. Can a weak battery or electrical issue trigger the P155D code?
Yes, low voltage or electrical issues can cause communication errors between the HDC module and other control systems, potentially triggering this code.
9. Do I need a professional to diagnose and repair the P155D code?
While basic checks like inspecting wiring can be done at home, diagnosing and repairing module communication issues or software updates typically require professional tools and expertise.
10. How much does it cost to fix the P155D code on a 2017 Chevrolet Silverado?
The cost varies depending on the root cause. Software updates may cost $100-$200, while repairs to wiring or sensors could range from $150-$500.
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