P155D 2014 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 2014 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 2014 GMC Sierra Description
What are the Possible Causes of the DTC P155D 2014 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 2014 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 2014 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 2014 GMC Sierra Code
What does OBDII code P155D mean on a 2014 GMC Sierra?
P155D indicates that the Hill Descent Control (HDC) system has detected an incorrect or inconsistent message counter, often related to communication errors within the vehicle's control modules.
What are the symptoms of the P155D code on a 2014 GMC Sierra?
Common symptoms include the Hill Descent Control system becoming inoperative, dashboard warning lights or messages, and potential loss of traction control functionality.
What causes the P155D code to appear on a 2014 GMC Sierra?
The code is usually caused by issues such as faulty wiring, a malfunctioning control module (e.g., ABS or HDC module), or corrupted software affecting communication between modules.
Can I still drive my 2014 GMC Sierra with the P155D code active?
While the vehicle may still be drivable, the Hill Descent Control system may not function properly, which could impact safety on steep declines or slippery surfaces.
How do I diagnose the P155D code on a 2014 GMC Sierra?
Diagnosis may involve scanning the vehicle for additional codes, inspecting wiring and connectors for damage or corrosion, and verifying proper communication between the control modules.
Is the P155D code related to other systems in the vehicle?
Yes, the code may be related to the ABS, traction control, or stability control systems, as they often communicate with the Hill Descent Control system.
How can I fix the P155D code on my 2014 GMC Sierra?
Repairs may include fixing damaged wiring, cleaning or replacing corroded connectors, updating control module software, or replacing a faulty control module.
Does the P155D code require a software update on a 2014 GMC Sierra?
In some cases, updating the software for the relevant control module may resolve the issue if it is caused by a communication error.
How much does it cost to repair the P155D code on a 2014 GMC Sierra?
Repair costs can vary widely, ranging from $100 for simple wiring repairs to $1,000 or more if a control module needs replacement and programming.
Can a faulty battery cause the P155D code on a 2014 GMC Sierra?
Yes, a weak or failing battery can cause communication errors between modules, potentially triggering the P155D code.
Discuss the causes and fixes for P155D 2014 GMC Sierra OBDII Code
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