AutoCodes – GMC – P103D GMC

P103D GMC Code - Engine Coolant Pump Control 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 Engine Coolant Pump Control Module, Engine Coolant Pump Control Module harness is open or shorted, Engine Coolant Pump 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
P103D GMC indicates Engine Coolant Pump Control Signal Message Counter Incorrect.
Common causes
Common causes include Faulty Engine Coolant Pump Control Module, Engine Coolant Pump Control Module harness is open or shorted, Engine Coolant Pump 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 545
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 19, 2022
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Code P103D GMC 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 Engine Coolant Pump Control Signal Message Counter is Incorrect.
OBDII Code P103D GMC - Engine Coolant Pump Control Signal Message Counter Incorrect - AutoCodes.com
P103D GMC Code - Engine Coolant Pump Control Signal Message Counter Incorrect

What are the Possible Causes of the DTC P103D GMC?

  • Faulty Engine Coolant Pump Control Module
  • Engine Coolant Pump Control Module harness is open or shorted
  • Engine Coolant Pump Control Module circuit poor electrical connection

How to Fix the DTC P103D GMC?

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 P103D GMC 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 P103D GMC code?

Need more information on how to fix the P103D GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P103D GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 P103D GMC Code

1. What are the common symptoms of OBDII code P103D GMC?

The common symptoms of code P103D GMC include engine overheating, decreased engine performance, and the illumination of the check engine light.

2. What can cause the OBDII code P103D GMC to trigger?

The P103D GMC code is typically triggered by a malfunction in the engine coolant pump control signal message counter, indicating an issue with the coolant pump or its control system.

3. How serious is the OBDII code P103D GMC?

Code P103D GMC should be addressed promptly to prevent potential engine damage due to overheating. It is recommended to have the issue diagnosed and repaired as soon as possible.

4. How can I diagnose the OBDII code P103D GMC?

Diagnosis of the P103D GMC code usually involves using a diagnostic scanner to retrieve the specific fault code and conducting further testing on the engine coolant pump and its control system.

5. What are some possible repair tips for OBDII code P103D GMC?

Repairing the P103D GMC code may involve checking the engine coolant pump for proper operation, inspecting the control signal message counter for faults, and addressing any wiring or connection issues in the coolant pump system.

6. Can I continue driving with the OBDII code P103D GMC present?

It is not recommended to continue driving with the P103D GMC code active, as it could lead to engine overheating and potential damage. It is best to address the issue promptly.

7. How much does it cost to fix the OBDII code P103D GMC?

The cost of fixing the P103D GMC code can vary depending on the underlying cause of the issue, the extent of repairs needed, and labor rates. It is advisable to consult a mechanic for an accurate quote.

8. Can I reset the OBDII code P103D GMC on my own?

While you can clear the code with an OBDII scanner, it is important to address the root cause of the issue before resetting the code. Simply clearing the code without fixing the problem may result in it recurring.

9. Is the OBDII code P103D GMC specific to GMC vehicles?

Yes, the P103D code is specific to GMC vehicles and is related to the engine coolant pump control signal message counter system used in certain GMC models.

10. How can I prevent the OBDII code P103D GMC from coming back?

Regular maintenance of the engine coolant system, including checking coolant levels, inspecting the coolant pump, and addressing any leaks or malfunctions promptly, can help prevent the recurrence of the P103D GMC code.

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