AutoCodes – Chevrolet – P150C 2018 Chevrolet Silverado

P150C 2018 Chevrolet Silverado Code - Transmission Control Module Engine Speed Request Signal Message Counter Incorrect

Quick Answer

To improve vehicle shift, and feel, the Transmission Control Module (TCM) is constantly sending the Engine Control Module (ECM) serial data messages with information regarding its request for modifying engine speed or torque. 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: P150C 2018 Chevrolet Silverado indicates Transmission Control Module Engine Speed Request Signal 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.

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Code Popularity 275

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 P150C 2018 Chevrolet Silverado Description

To improve vehicle shift, and feel, the Transmission Control Module (TCM) is constantly sending the Engine Control Module (ECM) serial data messages with information regarding its request for modifying engine speed or torque. The ECM sets this code when it detects a discrepancy in the structure of this message causing its integrity to be questioned. An intermittent fault in the Controller Area Network (CAN) circuits will cause Diagnostic Trouble Code (DTC) P150C to set.

OBDII Code P150C 2018 Chevrolet Silverado - Transmission Control Module Engine Speed Request Signal Message Counter Incorrect - AutoCodes.com — P150C 2018 Chevrolet Silverado Code - Transmission Control Module Engine Speed Request Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P150C 2018 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 P150C 2018 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 P150C 2018 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.

Need more information about the P150C 2018 Chevrolet Silverado code?

Need more information on how to fix the P150C 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P150C 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P150C 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P150C in a 2018 Chevrolet Silverado?

- Common symptoms include transmission shifting issues, rough idle, reduced engine performance, and the transmission going into limp mode.

2. What can cause the OBDII code P150C to trigger in a 2018 Chevrolet Silverado?

- The code P150C is triggered when the Transmission Control Module (TCM) detects an incorrect engine speed request signal message counter.

3. How serious is the OBDII code P150C in a 2018 Chevrolet Silverado?

- The code P150C can lead to drivability issues and potential transmission problems if not addressed promptly.

4. What are some possible repair tips for fixing the OBDII code P150C in a 2018 Chevrolet Silverado?

- Inspect and repair any damaged wiring or connectors related to the engine speed request signal. - Update the TCM software to the latest version. - Check for any loose connections or faulty components in the transmission system.

5. Can I drive my 2018 Chevrolet Silverado with the OBDII code P150C?

- It is not recommended to drive the vehicle when the code P150C is present, as it can cause further damage to the transmission system.

6. How do I diagnose the OBDII code P150C in my 2018 Chevrolet Silverado?

- Use an OBDII scanner to read the trouble codes and perform a thorough inspection of the transmission control system.

7. Will resetting the OBDII code P150C in my 2018 Chevrolet Silverado make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause of the problem.

8. How much does it typically cost to repair the OBDII code P150C in a 2018 Chevrolet Silverado?

- The cost of repairing the code P150C can vary depending on the extent of the issue and the specific repairs needed. It is recommended to consult with a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix the OBDII code P150C in a 2018 Chevrolet Silverado?

- Some basic troubleshooting steps can be attempted by a DIY enthusiast, but due to the complexity of transmission control systems, it is recommended to seek professional help for accurate diagnosis and repair.

10. Is the OBDII code P150C covered under warranty for a 2018 Chevrolet Silverado?

- Depending on the warranty status of your vehicle, the repair for the code P150C may be covered. It is advisable to check with your dealership or warranty provider for more information.