AutoCodes – GMC – P151D 2014 GMC Sierra

P151D 2014 GMC Sierra Code - Transmission Control Module Engine Shutdown Request Signal 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, 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: P151D 2014 GMC Sierra indicates Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Transmission Control Module, 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.

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Code Popularity 175

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P151D 2014 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module Engine Shutdown Request Signal Message Counter is Incorrect.

OBDII Code P151D 2014 GMC Sierra - Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect - AutoCodes.com — P151D 2014 GMC Sierra Code - Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P151D 2014 GMC Sierra?

Faulty Transmission Control Module
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC P151D 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 P151D 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.

Need more information about the P151D 2014 GMC Sierra code?

Need more information on how to fix the P151D 2014 GMC Sierra code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P151D 2014 GMC Sierra Code

1. What does the OBDII code P151D mean on a 2014 GMC Sierra?

The P151D code indicates that the Transmission Control Module (TCM) has detected an incorrect signal message counter related to the engine shutdown request.

2. What are the common symptoms of the P151D code in a 2014 GMC Sierra?

Symptoms may include erratic transmission behavior, the engine shutting down unexpectedly, reduced engine performance, or the check engine light illuminating.

3. What causes the P151D code to appear on a GMC Sierra?

Common causes include faulty wiring or connections between the TCM and ECM, a failing TCM, a software issue, or a malfunctioning ECM.

4. Can I continue driving with the P151D code on my 2014 GMC Sierra?

Itâ€™s not recommended to continue driving, as this code can lead to unexpected engine shutdowns, posing a safety risk.

5. How is the P151D code diagnosed on a GMC Sierra?

A mechanic will use a scan tool to check for related codes, inspect wiring and connectors for damage, and test the functionality of the TCM and ECM.

6. What repairs are commonly needed to fix the P151D code?

Repairs may include cleaning or repairing wiring and connectors, updating TCM software, or replacing a faulty TCM or ECM.

7. How much does it cost to fix the P151D code on a 2014 GMC Sierra?

Repair costs vary depending on the specific issue but can range from $100 for wiring repairs to $1,000 or more for TCM or ECM replacement.

8. Can a software update resolve the P151D code on a GMC Sierra?

Yes, in some cases, a software update for the TCM or ECM can resolve the issue if itâ€™s caused by a programming error.

9. What tools are needed to troubleshoot the P151D code?

A professional-grade scan tool, a multimeter to test wiring, and possibly a scope for signal analysis are typically needed.

10. Does the P151D code always indicate a bad TCM?

No, the code doesnâ€™t always mean the TCM is bad. It could also be caused by wiring issues, poor communication between modules, or software problems.