AutoCodes – GMC – P103D 2015 GMC Sierra

P103D 2015 GMC Sierra 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 2015 GMC Sierra 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 189

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 19, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P103D 2015 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 Engine Coolant Pump Control Signal Message Counter is Incorrect.

OBDII Code P103D 2015 GMC Sierra - Engine Coolant Pump Control Signal Message Counter Incorrect - AutoCodes.com — P103D 2015 GMC Sierra Code - Engine Coolant Pump Control Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P103D 2015 GMC Sierra?

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 2015 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 P103D 2015 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 P103D 2015 GMC Sierra 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 P103D 2015 GMC Sierra Code

1. What does the OBDII code P103D mean on a 2015 GMC Sierra?

The P103D code indicates an issue with the engine coolant pump control signal, specifically that the message counter is incorrect or inconsistent.

2. What are the symptoms of code P103D on a 2015 GMC Sierra?

Common symptoms include engine overheating, reduced engine performance, an illuminated check engine light, or erratic coolant pump operation.

3. What causes the P103D code to appear?

This code can be caused by a faulty engine coolant pump, wiring or connector issues, a malfunction in the engine control module (ECM), or software glitches.

4. Can I drive my 2015 GMC Sierra with a P103D code?

Itâ€™s not recommended to drive with this code because it can lead to engine overheating and potential long-term damage.

5. How do I diagnose the P103D code on my GMC Sierra?

Start by inspecting the coolant pump wiring and connectors for damage or corrosion. Use a scan tool to monitor coolant pump signals and verify the ECMâ€™s communication with the pump.

6. How is the P103D code fixed on a 2015 GMC Sierra?

Repairs may include replacing the engine coolant pump, repairing damaged wiring or connectors, or updating/reprogramming the ECM if needed.

7. How much does it cost to repair a P103D code?

Repair costs can vary, but replacing a coolant pump typically costs $300-$700, while wiring repairs or ECM reprogramming may add additional charges.

8. Can a software update fix the P103D code?

Yes, in some cases, a software update for the ECM can resolve communication issues causing the P103D code.

9. Does the P103D code mean my coolant pump is bad?

Not necessarily. While a faulty pump is a possibility, the issue could also stem from electrical problems or software errors.

10. What tools are needed to troubleshoot the P103D code?

Youâ€™ll need an OBDII scanner, a multimeter to check wiring continuity, and possibly manufacturer-specific diagnostic software for advanced troubleshooting.