AutoCodes – Cadillac – P151D Cadillac

P151D Cadillac 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 Cadillac 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 421
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 28, 2022
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Code P151D Cadillac 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 Cadillac - Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect - AutoCodes.com
P151D Cadillac Code - Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect

What are the Possible Causes of the DTC P151D Cadillac?

  • 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 Cadillac?

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 Cadillac 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 Cadillac code?

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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 Cadillac Code

1. What are common symptoms of OBDII code P151D in a Cadillac related to the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- Common symptoms may include engine stalling, difficulty starting the vehicle, and the transmission not shifting properly.

2. What could cause the OBDII code P151D in a Cadillac, indicating an issue with the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- Potential causes for this code could be a faulty transmission control module, a wiring issue in the communication system, or a software malfunction.

3. How can I diagnose the OBDII code P151D in a Cadillac related to the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- Diagnosis typically involves using a professional OBDII scanner to read the code, checking for any other related codes, and inspecting the TCM and related wiring for any visible damage.

4. Can I still drive my Cadillac with the OBDII code P151D indicating an issue with the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage or safety issues. It's best to address the problem promptly.

5. How can I repair the OBDII code P151D in a Cadillac related to the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- Repair options may include replacing the transmission control module, repairing any damaged wiring, and updating the software to the latest version recommended by Cadillac.

6. Is it necessary to reset the OBDII code P151D in a Cadillac after repairing the issue with the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- Yes, it is important to clear the code using an OBDII scanner after the repair to reset the system and ensure the issue has been resolved.

7. Are there any preventive maintenance tips to avoid encountering the OBDII code P151D in a Cadillac related to the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- Regularly inspecting the transmission system, following the manufacturer's maintenance schedule, and addressing any warning signs promptly can help prevent this issue.

8. Can a DIY enthusiast without much experience handle the repair for the OBDII code P151D in a Cadillac indicating a problem with the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- While some basic repairs like checking wiring connections can be done by DIY enthusiasts, diagnosing and repairing issues related to the transmission control module may require professional expertise.

9. How long does it typically take to repair the OBDII code P151D in a Cadillac related to the Transmission Control Module Engine Shutdown Request Signal Message Counter Incorrect?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. It is advisable to consult a mechanic for a more accurate estimate.

10. Is the OBDII code P151D specific to Cadillac vehicles, or can it occur in other car makes and models?

- While the specific code may be unique to Cadillac vehicles, similar issues related to the transmission control module can occur in other car makes and models, albeit with different diagnostic trouble codes.

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